Add getPriorSdkVersion to PackageManagerInternal

This enables system components to test whether the device just
upgraded from a previous version (without wiping /data), and if so
which version.

Bug: 290312729
Test: atest PackageManagerTest
Change-Id: I6669f56b80ebef3709e300cd2c8d98d4ffe46434

3 files changed, 16 insertions, 1 deletions

diff --git a/services/core/java/android/content/pm/PackageManagerInternal.java b/services/core/java/android/content/pm/PackageManagerInternal.java
index cac2efba1c89..08093c0c037f 100644
--- a/services/core/java/android/content/pm/PackageManagerInternal.java
+++ b/services/core/java/android/content/pm/PackageManagerInternal.java
@@ -1463,4 +1463,9 @@ public abstract class PackageManagerInternal {
      */
     @NonNull
     public abstract PackageArchiver getPackageArchiver();
+
+    /**
+     * Returns true if the device is upgrading from an SDK version lower than the one specified.
+     */
+    public abstract boolean isUpgradingFromLowerThan(int sdkVersion);
 }
diff --git a/services/core/java/com/android/server/pm/PackageManagerService.java b/services/core/java/com/android/server/pm/PackageManagerService.java
index bc441b84c58b..197ac05d1cd8 100644
--- a/services/core/java/com/android/server/pm/PackageManagerService.java
+++ b/services/core/java/com/android/server/pm/PackageManagerService.java
@@ -606,6 +606,8 @@ public class PackageManagerService implements PackageSender, TestUtilityService
     private final boolean mIsUpgrade;
     private final boolean mIsPreNMR1Upgrade;
     private final boolean mIsPreQUpgrade;
+    // If mIsUpgrade == true, contains the prior SDK version, else -1.
+    private final int mPriorSdkVersion;
 
     // Used for privilege escalation. MUST NOT BE CALLED WITH mPackages
     // LOCK HELD.  Can be called with mInstallLock held.
@@ -1890,6 +1892,7 @@ public class PackageManagerService implements PackageSender, TestUtilityService
         mInstantAppResolverSettingsComponent = testParams.instantAppResolverSettingsComponent;
         mIsPreNMR1Upgrade = testParams.isPreNmr1Upgrade;
         mIsPreQUpgrade = testParams.isPreQupgrade;
+        mPriorSdkVersion = testParams.priorSdkVersion;
         mIsUpgrade = testParams.isUpgrade;
         mMetrics = testParams.Metrics;
         mModuleInfoProvider = testParams.moduleInfoProvider;
@@ -2229,7 +2232,7 @@ public class PackageManagerService implements PackageSender, TestUtilityService
                         "Upgrading from " + ver.fingerprint + " (" + ver.buildFingerprint + ") to "
                                 + PackagePartitions.FINGERPRINT + " (" + Build.FINGERPRINT + ")");
             }
-
+            mPriorSdkVersion = mIsUpgrade ? ver.sdkVersion : -1;
             mInitAppsHelper = new InitAppsHelper(this, mApexManager, mInstallPackageHelper,
                     mInjector.getSystemPartitions());
 
@@ -7098,6 +7101,12 @@ public class PackageManagerService implements PackageSender, TestUtilityService
             mPackageMonitorCallbackHelper.notifyPackageMonitorWithIntent(intent, userId,
                     visibilityAllowList, mHandler);
         }
+
+        @Override
+        public boolean isUpgradingFromLowerThan(int sdkVersion) {
+            final boolean isUpgrading = mPriorSdkVersion != -1;
+            return isUpgrading && mPriorSdkVersion < sdkVersion;
+        }
     }
 
     private void setEnabledOverlayPackages(@UserIdInt int userId,
diff --git a/services/core/java/com/android/server/pm/PackageManagerServiceTestParams.java b/services/core/java/com/android/server/pm/PackageManagerServiceTestParams.java
index 655b9c93d9dd..ea2e40ea427d 100644
--- a/services/core/java/com/android/server/pm/PackageManagerServiceTestParams.java
+++ b/services/core/java/com/android/server/pm/PackageManagerServiceTestParams.java
@@ -65,6 +65,7 @@ public final class PackageManagerServiceTestParams {
     public ComponentName instantAppResolverSettingsComponent;
     public boolean isPreNmr1Upgrade;
     public boolean isPreQupgrade;
+    public int priorSdkVersion = -1;
     public boolean isUpgrade;
     public LegacyPermissionManagerInternal legacyPermissionManagerInternal;
     public DisplayMetrics Metrics;