[API feedback] fixed API for NR

This CL included the follow change:
1. Change getPreferredNetworkTypeBitmap to
getPreferredNetworkTypeBitmask [b/126552419]
2. Change setPreferredNetworkTypeBitmap to
setPreferredNetworkTypeBitmask [b/126552419]
3. Add @IntRange annonation to CellIdentityNr.getNrarfcn() [b/126552419]

4. In javadoc, explain the acronym NR to say: (New Radio 5G)
[b/126552559]

5. Mark CellInfoNr.getCellSignalStrength and CellInfoNr.getCellIdentity
    as @NonNull [b/126699572]

6. Mark CellIdentityNr.getMncString() and CellIdentityNr.getMccString()
    as @Nullable [b/126702744]

Bug: 126552419
Bug: 126552559
Bug: 126699572
Bug: 126702744
Test: build
Merged-In: I133075a3688c3fa7550c8a2f43bc13d8b25999b2
Change-Id: I133075a3688c3fa7550c8a2f43bc13d8b25999b2

5 files changed, 30 insertions, 28 deletions

diff --git a/api/current.txt b/api/current.txt
index 733dd0c0ca59..0f7655c71931 100755
--- a/api/current.txt
+++ b/api/current.txt
@@ -42351,12 +42351,12 @@ package android.telephony {
   }
 
   public final class CellIdentityNr extends android.telephony.CellIdentity {
-    method public String getMccString();
-    method public String getMncString();
+    method @Nullable public String getMccString();
+    method @Nullable public String getMncString();
     method public long getNci();
-    method public int getNrarfcn();
-    method public int getPci();
-    method public int getTac();
+    method @IntRange(from=0, to=3279165) public int getNrarfcn();
+    method @IntRange(from=0, to=1007) public int getPci();
+    method @IntRange(from=0, to=65535) public int getTac();
     method public void writeToParcel(android.os.Parcel, int);
     field public static final android.os.Parcelable.Creator<android.telephony.CellIdentityNr> CREATOR;
   }
@@ -42423,8 +42423,8 @@ package android.telephony {
   }
 
   public final class CellInfoNr extends android.telephony.CellInfo {
-    method public android.telephony.CellIdentity getCellIdentity();
-    method public android.telephony.CellSignalStrength getCellSignalStrength();
+    method @NonNull public android.telephony.CellIdentity getCellIdentity();
+    method @NonNull public android.telephony.CellSignalStrength getCellSignalStrength();
     method public void writeToParcel(android.os.Parcel, int);
     field public static final android.os.Parcelable.Creator<android.telephony.CellInfoNr> CREATOR;
   }
diff --git a/api/system-current.txt b/api/system-current.txt
index e26c6479706d..53d2f3e4bb11 100644
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -6386,7 +6386,7 @@ package android.telephony {
     method @Nullable @RequiresPermission(android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE) public String getIsimIst();
     method @NonNull @RequiresPermission(android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE) public java.util.Map<java.lang.Integer,java.lang.Integer> getLogicalToPhysicalSlotMapping();
     method public static long getMaxNumberVerificationTimeoutMillis();
-    method @RequiresPermission(android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE) public long getPreferredNetworkTypeBitmap();
+    method @RequiresPermission(android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE) public long getPreferredNetworkTypeBitmask();
     method @RequiresPermission(anyOf={android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE, android.Manifest.permission.READ_PHONE_STATE}) public int getRadioPowerState();
     method public int getSimApplicationState();
     method public int getSimCardState();
@@ -6423,7 +6423,7 @@ package android.telephony {
     method @Deprecated @RequiresPermission(android.Manifest.permission.MODIFY_PHONE_STATE) public void setDataEnabled(int, boolean);
     method @RequiresPermission(android.Manifest.permission.MODIFY_PHONE_STATE) public void setDataRoamingEnabled(boolean);
     method @RequiresPermission(android.Manifest.permission.MODIFY_PHONE_STATE) public void setMultisimCarrierRestriction(boolean);
-    method @RequiresPermission(android.Manifest.permission.MODIFY_PHONE_STATE) public boolean setPreferredNetworkTypeBitmap(long);
+    method @RequiresPermission(android.Manifest.permission.MODIFY_PHONE_STATE) public boolean setPreferredNetworkTypeBitmask(long);
     method @RequiresPermission(android.Manifest.permission.MODIFY_PHONE_STATE) public boolean setRadio(boolean);
     method @RequiresPermission(android.Manifest.permission.MODIFY_PHONE_STATE) public boolean setRadioPower(boolean);
     method @RequiresPermission(android.Manifest.permission.MODIFY_PHONE_STATE) public void setSimPowerState(int);
diff --git a/telephony/java/android/telephony/CellIdentityNr.java b/telephony/java/android/telephony/CellIdentityNr.java
index b94ca9b3f927..771e7b9a8076 100644
--- a/telephony/java/android/telephony/CellIdentityNr.java
+++ b/telephony/java/android/telephony/CellIdentityNr.java
@@ -16,13 +16,15 @@
 
 package android.telephony;
 
+import android.annotation.IntRange;
+import android.annotation.Nullable;
 import android.os.Parcel;
 import android.telephony.gsm.GsmCellLocation;
 
 import java.util.Objects;
 
 /**
- * Information to represent a unique 5G NR cell.
+ * Information to represent a unique NR(New Radio 5G) cell.
  */
 public final class CellIdentityNr extends CellIdentity {
     private static final String TAG = "CellIdentityNr";
@@ -79,7 +81,7 @@ public final class CellIdentityNr extends CellIdentity {
     }
 
     /**
-     * Get the NR Cell Identity.
+     * Get the NR(New Radio 5G) Cell Identity.
      *
      * @return The 36-bit NR Cell Identity in range [0, 68719476735] or
      *         {@link CellInfo#UNAVAILABLE_LONG} if unknown.
@@ -96,6 +98,7 @@ public final class CellIdentityNr extends CellIdentity {
      *
      * @return Integer value in range [0, 3279165] or {@link CellInfo#UNAVAILABLE} if unknown.
      */
+    @IntRange(from = 0, to = 3279165)
     public int getNrarfcn() {
         return mNrArfcn;
     }
@@ -104,6 +107,7 @@ public final class CellIdentityNr extends CellIdentity {
      * Get the physical cell id.
      * @return Integer value in range [0, 1007] or {@link CellInfo#UNAVAILABLE} if unknown.
      */
+    @IntRange(from = 0, to = 1007)
     public int getPci() {
         return mPci;
     }
@@ -112,6 +116,7 @@ public final class CellIdentityNr extends CellIdentity {
      * Get the tracking area code.
      * @return a 16 bit integer or {@link CellInfo#UNAVAILABLE} if unknown.
      */
+    @IntRange(from = 0, to = 65535)
     public int getTac() {
         return mTac;
     }
@@ -119,6 +124,7 @@ public final class CellIdentityNr extends CellIdentity {
     /**
      * @return Mobile Country Code in string format, or {@code null} if unknown.
      */
+    @Nullable
     public String getMccString() {
         return mMccStr;
     }
@@ -126,6 +132,7 @@ public final class CellIdentityNr extends CellIdentity {
     /**
      * @return Mobile Network Code in string fomrat, or {@code null} if unknown.
      */
+    @Nullable
     public String getMncString() {
         return mMncStr;
     }
diff --git a/telephony/java/android/telephony/CellInfoNr.java b/telephony/java/android/telephony/CellInfoNr.java
index 11857a60783d..7f7902c76095 100644
--- a/telephony/java/android/telephony/CellInfoNr.java
+++ b/telephony/java/android/telephony/CellInfoNr.java
@@ -16,6 +16,7 @@
 
 package android.telephony;
 
+import android.annotation.NonNull;
 import android.os.Parcel;
 
 import java.util.Objects;
@@ -36,11 +37,13 @@ public final class CellInfoNr extends CellInfo {
     }
 
     @Override
+    @NonNull
     public CellIdentity getCellIdentity() {
         return mCellIdentity;
     }
 
     @Override
+    @NonNull
     public CellSignalStrength getCellSignalStrength() {
         return mCellSignalStrength;
     }
diff --git a/telephony/java/android/telephony/TelephonyManager.java b/telephony/java/android/telephony/TelephonyManager.java
index 43dcc6b27c66..289d2122e4c7 100644
--- a/telephony/java/android/telephony/TelephonyManager.java
+++ b/telephony/java/android/telephony/TelephonyManager.java
@@ -6762,14 +6762,12 @@ public class TelephonyManager {
             }
         } catch (RemoteException ex) {
             Rlog.e(TAG, "getPreferredNetworkType RemoteException", ex);
-        } catch (NullPointerException ex) {
-            Rlog.e(TAG, "getPreferredNetworkType NPE", ex);
         }
         return -1;
     }
 
     /**
-     * Get the preferred network type bitmap.
+     * Get the preferred network type bitmask.
      *
      * <p>If this object has been created with {@link #createForSubscriptionId}, applies to the
      * given subId. Otherwise, applies to {@link SubscriptionManager#getDefaultSubscriptionId()}
@@ -6778,13 +6776,13 @@ public class TelephonyManager {
      * {@link android.Manifest.permission#READ_PRIVILEGED_PHONE_STATE READ_PRIVILEGED_PHONE_STATE}
      * or that the calling app has carrier privileges (see {@link #hasCarrierPrivileges}).
      *
-     * @return The bitmap of preferred network types.
+     * @return The bitmask of preferred network types.
      *
      * @hide
      */
     @RequiresPermission(android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE)
     @SystemApi
-    public @NetworkTypeBitMask long getPreferredNetworkTypeBitmap() {
+    public @NetworkTypeBitMask long getPreferredNetworkTypeBitmask() {
         try {
             ITelephony telephony = getITelephony();
             if (telephony != null) {
@@ -6792,9 +6790,7 @@ public class TelephonyManager {
                         telephony.getPreferredNetworkType(getSubId()));
             }
         } catch (RemoteException ex) {
-            Rlog.e(TAG, "getPreferredNetworkTypeBitmap RemoteException", ex);
-        } catch (NullPointerException ex) {
-            Rlog.e(TAG, "getPreferredNetworkTypeBitmap NPE", ex);
+            Rlog.e(TAG, "getPreferredNetworkTypeBitmask RemoteException", ex);
         }
         return 0;
     }
@@ -7019,14 +7015,12 @@ public class TelephonyManager {
             }
         } catch (RemoteException ex) {
             Rlog.e(TAG, "setPreferredNetworkType RemoteException", ex);
-        } catch (NullPointerException ex) {
-            Rlog.e(TAG, "setPreferredNetworkType NPE", ex);
         }
         return false;
     }
 
     /**
-     * Set the preferred network type bitmap.
+     * Set the preferred network type bitmask.
      *
      * <p>If this object has been created with {@link #createForSubscriptionId}, applies to the
      * given subId. Otherwise, applies to {@link SubscriptionManager#getDefaultSubscriptionId()}
@@ -7035,24 +7029,22 @@ public class TelephonyManager {
      * {@link android.Manifest.permission#MODIFY_PHONE_STATE MODIFY_PHONE_STATE} or that the calling
      * app has carrier privileges (see {@link #hasCarrierPrivileges}).
      *
-     * @param networkTypeBitmap The bitmap of preferred network types.
+     * @param networkTypeBitmask The bitmask of preferred network types.
      * @return true on success; false on any failure.
      * @hide
      */
     @RequiresPermission(android.Manifest.permission.MODIFY_PHONE_STATE)
     @SystemApi
-    public boolean setPreferredNetworkTypeBitmap(@NetworkTypeBitMask long networkTypeBitmap) {
+    public boolean setPreferredNetworkTypeBitmask(@NetworkTypeBitMask long networkTypeBitmask) {
         try {
             ITelephony telephony = getITelephony();
             if (telephony != null) {
                 return telephony.setPreferredNetworkType(
                         getSubId(), RadioAccessFamily.getNetworkTypeFromRaf(
-                                (int) networkTypeBitmap));
+                                (int) networkTypeBitmask));
             }
         } catch (RemoteException ex) {
-            Rlog.e(TAG, "setPreferredNetworkType RemoteException", ex);
-        } catch (NullPointerException ex) {
-            Rlog.e(TAG, "setPreferredNetworkType NPE", ex);
+            Rlog.e(TAG, "setPreferredNetworkTypeBitmask RemoteException", ex);
         }
         return false;
     }