Add @GuardedBy annotation to PersistentDataBlockService#mIsWritable. am: 71d2a41dd9 am: d0339c6e8f am: 6aa436bef2 am: 76ca2da7e8 am: 0cc0219089

am: ced5ab190c

Change-Id: I59602f83fd659ce5192636d0e66feae217997d7c

services/core/java/com/android/server/PersistentDataBlockService.java

@@ -31,6 +31,7 @@ import android.service.persistentdata.PersistentDataBlockManager;
 import android.util.Slog;
 
 import com.android.internal.R;
+import com.android.internal.annotations.GuardedBy;
 
 import libcore.io.IoUtils;
 
@@ -82,6 +83,8 @@ public class PersistentDataBlockService extends SystemService {
 
     private int mAllowedUid = -1;
     private long mBlockDeviceSize;
+
+    @GuardedBy("mLock")
     private boolean mIsWritable = true;
 
     public PersistentDataBlockService(Context context) {