Merge "new password shouldn't be empty string"

am: dd7bd6b15a

Change-Id: I8e3fb81aba487df22573b6fa67a36e2973c9a54b

src/com/android/settings/SetFullBackupPassword.java

@@ -21,6 +21,7 @@ import android.app.backup.IBackupManager;
 import android.os.Bundle;
 import android.os.RemoteException;
 import android.os.ServiceManager;
+import android.text.TextUtils;
 import android.util.Log;
 import android.view.View;
 import android.view.View.OnClickListener;
@@ -96,6 +97,11 @@ Log.i(TAG, "failure; password mismatch?");
     }
 
     private boolean setBackupPassword(String currentPw, String newPw) {
+        // new password can't be empty
+        if (TextUtils.isEmpty(newPw)) {
+            return false;
+        }
+
         try {
             return mBackupManager.setBackupPassword(currentPw, newPw);
         } catch (RemoteException e) {