Fix switch & slider anim, make View drawable hotspot API public

BUG: 15287810
Change-Id: Ic7a9549dc1ba8afd07e9a196371ed349a54aaf2f
diff --git a/core/java/android/widget/Switch.java b/core/java/android/widget/Switch.java
index 03193a2..cca29cf 100644
--- a/core/java/android/widget/Switch.java
+++ b/core/java/android/widget/Switch.java
@@ -962,10 +962,9 @@
         invalidate();
     }
 
-    /** @hide */
     @Override
-    protected void setDrawableHotspot(float x, float y) {
-        super.setDrawableHotspot(x, y);
+    public void drawableHotspotChanged(float x, float y) {
+        super.drawableHotspotChanged(x, y);
 
         if (mThumbDrawable != null) {
             mThumbDrawable.setHotspot(x, y);