Update deletion conditions for a package's UsageStats.

If a profile owner is defined for a specific user, do not delete usage
stats for a package on package deletion.

Bug: 197399948
Test: atest UserUsageStatsServiceTest
Test: atest UsageStatsTest [all]
Change-Id: I94a8e3dfca8ef4c7616f77944d61726e06043b85

core/java/android/app/admin/DevicePolicyManagerInternal.java

@@ -16,6 +16,7 @@
 
 package android.app.admin;
 
+import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.annotation.UserIdInt;
 import android.content.ComponentName;
@@ -76,6 +77,13 @@ public abstract class DevicePolicyManagerInternal {
     public abstract void addOnCrossProfileWidgetProvidersChangeListener(
             OnCrossProfileWidgetProvidersChangeListener listener);
 
+    /**
+     * @param userHandle the handle of the user whose profile owner is being fetched.
+     * @return the configured supervision app if it exists and is the device owner or policy owner.
+     */
+    public abstract @Nullable ComponentName getProfileOwnerOrDeviceOwnerSupervisionComponent(
+            @NonNull UserHandle userHandle);
+
     /**
      * Checks if an app with given uid is an active device owner of its user.
      *

services/devicepolicy/java/com/android/server/devicepolicy/DevicePolicyManagerService.java

@@ -12746,6 +12746,13 @@ public class DevicePolicyManagerService extends BaseIDevicePolicyManager {
             }
         }
 
+        @Override
+        public @Nullable ComponentName getProfileOwnerOrDeviceOwnerSupervisionComponent(
+                @NonNull UserHandle userHandle) {
+            return DevicePolicyManagerService.this.getProfileOwnerOrDeviceOwnerSupervisionComponent(
+                    userHandle);
+        }
+
         @Override
         public boolean isActiveDeviceOwner(int uid) {
             return isDeviceOwner(new CallerIdentity(uid, null, null));

services/tests/mockingservicestests/src/com/android/server/usage/UserUsageStatsServiceTest.java

@@ -83,7 +83,7 @@ public class UserUsageStatsServiceTest {
         HashMap<String, Long> installedPkgs = new HashMap<>();
         installedPkgs.put(TEST_PACKAGE_NAME, System.currentTimeMillis());
 
-        mService.init(System.currentTimeMillis(), installedPkgs);
+        mService.init(System.currentTimeMillis(), installedPkgs, true);
     }
 
     @After

services/usage/java/com/android/server/usage/UsageStatsService.java

@@ -403,6 +403,7 @@ public class UsageStatsService extends SystemService implements
         if (userId == UserHandle.USER_SYSTEM) {
             UsageStatsIdleService.scheduleUpdateMappingsJob(getContext());
         }
+        final boolean deleteObsoleteData = shouldDeleteObsoleteData(UserHandle.of(userId));
         synchronized (mLock) {
             // This should be safe to add this early. Other than reportEventOrAddToQueue and
             // getBackupPayload, every other user grabs the lock before accessing
@@ -425,7 +426,7 @@ public class UsageStatsService extends SystemService implements
             boolean needToFlush = !pendingEvents.isEmpty();
 
             initializeUserUsageStatsServiceLocked(userId, System.currentTimeMillis(),
-                    installedPackages);
+                    installedPackages, deleteObsoleteData);
             final UserUsageStatsService userService = getUserUsageStatsServiceLocked(userId);
             if (userService == null) {
                 Slog.i(TAG, "Attempted to unlock stopped or removed user " + userId);
@@ -651,13 +652,13 @@ public class UsageStatsService extends SystemService implements
      * when the user is initially unlocked.
      */
     private void initializeUserUsageStatsServiceLocked(int userId, long currentTimeMillis,
-            HashMap<String, Long> installedPackages) {
+            HashMap<String, Long> installedPackages, boolean deleteObsoleteData) {
         final File usageStatsDir = new File(Environment.getDataSystemCeDirectory(userId),
                 "usagestats");
         final UserUsageStatsService service = new UserUsageStatsService(getContext(), userId,
                 usageStatsDir, this);
         try {
-            service.init(currentTimeMillis, installedPackages);
+            service.init(currentTimeMillis, installedPackages, deleteObsoleteData);
             mUserState.put(userId, service);
         } catch (Exception e) {
             if (mUserManager.isUserUnlocked(userId)) {
@@ -1246,6 +1247,10 @@ public class UsageStatsService extends SystemService implements
      * Called by the Binder stub.
      */
     private boolean updatePackageMappingsData() {
+        // don't update the mappings if a profile user is defined
+        if (!shouldDeleteObsoleteData(UserHandle.SYSTEM)) {
+            return true; // return true so job scheduler doesn't reschedule the job
+        }
         // fetch the installed packages outside the lock so it doesn't block package manager.
         final HashMap<String, Long> installedPkgs = getInstalledPackages(UserHandle.USER_SYSTEM);
         synchronized (mLock) {
@@ -1584,6 +1589,13 @@ public class UsageStatsService extends SystemService implements
         mEstimatedLaunchTimeChangedListeners.remove(listener);
     }
 
+    private boolean shouldDeleteObsoleteData(UserHandle userHandle) {
+        final DevicePolicyManagerInternal dpmInternal = getDpmInternal();
+        // If a profile owner is not defined for the given user, obsolete data should be deleted
+        return dpmInternal == null
+                || dpmInternal.getProfileOwnerOrDeviceOwnerSupervisionComponent(userHandle) == null;
+    }
+
     private String buildFullToken(String packageName, String token) {
         final StringBuilder sb = new StringBuilder(packageName.length() + token.length() + 1);
         sb.append(packageName);
@@ -2862,8 +2874,12 @@ public class UsageStatsService extends SystemService implements
     private class MyPackageMonitor extends PackageMonitor {
         @Override
         public void onPackageRemoved(String packageName, int uid) {
-            mHandler.obtainMessage(MSG_PACKAGE_REMOVED, getChangingUserId(), 0, packageName)
-                    .sendToTarget();
+            final int changingUserId = getChangingUserId();
+            // Only remove the package's data if a profile owner is not defined for the user
+            if (shouldDeleteObsoleteData(UserHandle.of(changingUserId))) {
+                mHandler.obtainMessage(MSG_PACKAGE_REMOVED, changingUserId, 0, packageName)
+                        .sendToTarget();
+            }
             super.onPackageRemoved(packageName, uid);
         }
     }

services/usage/java/com/android/server/usage/UserUsageStatsService.java

@@ -117,8 +117,9 @@ class UserUsageStatsService {
         mSystemTimeSnapshot = System.currentTimeMillis();
     }
 
-    void init(final long currentTimeMillis, HashMap<String, Long> installedPackages) {
-        readPackageMappingsLocked(installedPackages);
+    void init(final long currentTimeMillis, HashMap<String, Long> installedPackages,
+            boolean deleteObsoleteData) {
+        readPackageMappingsLocked(installedPackages, deleteObsoleteData);
         mDatabase.init(currentTimeMillis);
         if (mDatabase.wasUpgradePerformed()) {
             mDatabase.prunePackagesDataOnUpgrade(installedPackages);
@@ -182,12 +183,13 @@ class UserUsageStatsService {
         return mDatabase.onPackageRemoved(packageName, timeRemoved);
     }
 
-    private void readPackageMappingsLocked(HashMap<String, Long> installedPackages) {
+    private void readPackageMappingsLocked(HashMap<String, Long> installedPackages,
+            boolean deleteObsoleteData) {
         mDatabase.readMappingsLocked();
         // Package mappings for the system user are updated after 24 hours via a job scheduled by
         // UsageStatsIdleService to ensure restored data is not lost on first boot. Additionally,
         // this makes user service initialization a little quicker on subsequent boots.
-        if (mUserId != UserHandle.USER_SYSTEM) {
+        if (mUserId != UserHandle.USER_SYSTEM && deleteObsoleteData) {
             updatePackageMappingsLocked(installedPackages);
         }
     }