Fix getAsuLevel returns "99" in Lte and TdScdma.

GetAsuLevel method judges valid signal by
getLteLevel/getTdScdmaLevel. However, level is
SIGNAL_STRENGTH_NONE_OR_UNKNOWN does not mean not in
Lte/TdScdma.
For example, if mLteRsrp is in (threshRsrp[1],
threshRsrp[0]], getLteLevel would return
SIGNAL_STRENGTH_NONE_OR_UNKNOWN. But this only
means Lte signal is very weak, and ASU should be
(mLteRsrp + 140) not "99" (3GPP 27.007 Sec 8.69).

Bug: 72116430
Test: Build
Change-Id: If930c3e3d23a9af7b2e51e3560cc28607a6328c0

1 files changed, 5 insertions, 7 deletions

diff --git a/telephony/java/android/telephony/SignalStrength.java b/telephony/java/android/telephony/SignalStrength.java
index f1f965196322..fc2ef2782b78 100644
--- a/telephony/java/android/telephony/SignalStrength.java
+++ b/telephony/java/android/telephony/SignalStrength.java
@@ -492,14 +492,12 @@ public class SignalStrength implements Parcelable {
     public int getAsuLevel() {
         int asuLevel = 0;
         if (mIsGsm) {
-            if (getLteLevel() == SIGNAL_STRENGTH_NONE_OR_UNKNOWN) {
-                if (getTdScdmaLevel() == SIGNAL_STRENGTH_NONE_OR_UNKNOWN) {
-                    asuLevel = getGsmAsuLevel();
-                } else {
-                    asuLevel = getTdScdmaAsuLevel();
-                }
-            } else {
+            if (mLteRsrp != SignalStrength.INVALID) {
                 asuLevel = getLteAsuLevel();
+            } else if (mTdScdmaRscp != SignalStrength.INVALID) {
+                asuLevel = getTdScdmaAsuLevel();
+            } else {
+                asuLevel = getGsmAsuLevel();
             }
         } else {
             int cdmaAsuLevel = getCdmaAsuLevel();