Merge "Clear calling identity when get package uid."

            // "= 0" is needed because otherwise catch(RemoteException) would make it look like

            // packageUid may not be initialized.

            int packageUid = 0;

            final long ident = Binder.clearCallingIdentity();

            try {

                packageUid = AppGlobals.getPackageManager().getPackageUid(

                        packageName, PackageManager.MATCH_DEBUG_TRIAGED_MISSING, userId);

            } catch (RemoteException e) {

                // Shouldn't happen.

            } finally {

                Binder.restoreCallingIdentity(ident);

            }

            synchronized (ActivityManagerService.this) {