Add null check for retrieved package.

PackageManagerInternal.getPackage() states that the returned value can
be null. Check that the returned object isn't null before calling any of
its methods to avoid NullPointerExceptions.

Bug: 154899364
Test: atest FrameworksServicesTests:AppStandbyControllerTests
Change-Id: Ifcb200a4a0ed6582cc1a368c2949f0aaf32d7dd2

apex/jobscheduler/service/java/com/android/server/usage/AppStandbyController.java

@@ -110,6 +110,7 @@ import com.android.internal.util.ArrayUtils;
 import com.android.internal.util.ConcurrentUtils;
 import com.android.internal.util.IndentingPrintWriter;
 import com.android.server.LocalServices;
+import com.android.server.pm.parsing.pkg.AndroidPackage;
 import com.android.server.usage.AppIdleHistory.AppUsageHistory;
 
 import java.io.File;
@@ -1862,10 +1863,15 @@ public class AppStandbyController implements AppStandbyInternal {
 
         public List<UserHandle> getValidCrossProfileTargets(String pkg, int userId) {
             final int uid = mPackageManagerInternal.getPackageUidInternal(pkg, 0, userId);
+            final AndroidPackage aPkg = mPackageManagerInternal.getPackage(uid);
             if (uid < 0
-                    || !mPackageManagerInternal.getPackage(uid).isCrossProfile()
+                    || aPkg == null
+                    || !aPkg.isCrossProfile()
                     || !mCrossProfileAppsInternal
                             .verifyUidHasInteractAcrossProfilePermission(pkg, uid)) {
+                if (uid >= 0 && aPkg == null) {
+                    Slog.wtf(TAG, "Null package retrieved for UID " + uid);
+                }
                 return Collections.emptyList();
             }
             return mCrossProfileAppsInternal.getTargetUserProfiles(pkg, userId);