Fixed that volume buttons were not working on the pin input

Because we were intercepting all buttons.

Change-Id: Id2155f23d55cb5282c87409b9c6b8441540ad894
Fixes: 28786740

packages/Keyguard/src/com/android/keyguard/KeyguardPinBasedInputView.java

@@ -239,8 +239,7 @@ public abstract class KeyguardPinBasedInputView extends KeyguardAbsKeyInputView
     @Override
     public boolean onKey(View v, int keyCode, KeyEvent event) {
         if (event.getAction() == KeyEvent.ACTION_DOWN) {
-            onKeyDown(keyCode, event);
-            return true;
+            return onKeyDown(keyCode, event);
         }
         return false;
     }