Unhide View.isOpaque().

Change-Id: I96444af2a7e66a330a2c4b3fa0a173ec5ab4ed40

api/current.xml

@@ -158108,6 +158108,17 @@
  visibility="public"
 >
 </method>
+<method name="isOpaque"
+ return="boolean"
+ abstract="false"
+ native="false"
+ synchronized="false"
+ static="false"
+ final="false"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</method>
 <method name="isPaddingOffsetRequired"
  return="boolean"
  abstract="false"

core/java/android/view/View.java

@@ -4956,8 +4956,6 @@ public class View implements Drawable.Callback, KeyEvent.Callback, Accessibility
      * invalidate/draw passes.
      *
      * @return True if this View is guaranteed to be fully opaque, false otherwise.
-     *
-     * @hide Pending API council approval
      */
     @ViewDebug.ExportedProperty
     public boolean isOpaque() {