Add APIs for obtaining themed Drawable from Theme, Context

BUG: 12611005
Change-Id: Ic0057be4e4c2d0c61ce02a019b3f7d0625e3a016
diff --git a/core/java/com/android/internal/app/ActionBarImpl.java b/core/java/com/android/internal/app/ActionBarImpl.java
index 347f957..0a80495 100644
--- a/core/java/com/android/internal/app/ActionBarImpl.java
+++ b/core/java/com/android/internal/app/ActionBarImpl.java
@@ -1081,7 +1081,7 @@
 
         @Override
         public Tab setIcon(int resId) {
-            return setIcon(mContext.getResources().getDrawable(resId));
+            return setIcon(mContext.getDrawable(resId));
         }
 
         @Override