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

BUG: 15287810
Change-Id: Ic7a9549dc1ba8afd07e9a196371ed349a54aaf2f
diff --git a/core/java/android/widget/CompoundButton.java b/core/java/android/widget/CompoundButton.java
index 747d2b1..9ba0fe1 100644
--- a/core/java/android/widget/CompoundButton.java
+++ b/core/java/android/widget/CompoundButton.java
@@ -24,7 +24,6 @@
 import android.content.res.ColorStateList;
 import android.content.res.TypedArray;
 import android.graphics.Canvas;
-import android.graphics.PorterDuff.Mode;
 import android.graphics.drawable.Drawable;
 import android.os.Parcel;
 import android.os.Parcelable;
@@ -431,10 +430,9 @@
         }
     }
 
-    /** @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 (mButtonDrawable != null) {
             mButtonDrawable.setHotspot(x, y);