Merge "Fixed unnecessary layer creations in the pin unlock method" into lmp-dev

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

@@ -152,6 +152,11 @@ public class NumPadKey extends ViewGroup {
         mKlondikeText.layout(left, top, left + mKlondikeText.getMeasuredWidth(), bottom);
     }
 
+    @Override
+    public boolean hasOverlappingRendering() {
+        return false;
+    }
+
     // Cause a VIRTUAL_KEY vibration
     public void doHapticKeyClick() {
         if (mEnableHaptics) {

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

@@ -145,6 +145,11 @@ public class PasswordTextView extends View {
         }
     }
 
+    @Override
+    public boolean hasOverlappingRendering() {
+        return false;
+    }
+
     private Rect getCharBounds() {
         float textHeight = mTextHeightRaw * getResources().getDisplayMetrics().scaledDensity;
         mDrawPaint.setTextSize(textHeight);