Remove incorrect isEnabled() check

Bug: 15683945

 invokeFunctor() does not require isEnabled() to be true
 to execute. Specifically it does not care if HardwareRenderer
 has a Surface or not, as it will fall back to a pbuffer surface
 if available. If there is no context at all, it will invoke
 with kModeProcessNoContext.

Change-Id: Ie6abe566b92c8fa33bb7a673fc3b9fa9ce913446

core/java/android/view/ViewRootImpl.java

@@ -656,7 +656,7 @@ public final class ViewRootImpl implements ViewParent,
     }
 
     public boolean invokeFunctor(long functor, boolean waitForCompletion) {
-        if (mAttachInfo.mHardwareRenderer == null || !mAttachInfo.mHardwareRenderer.isEnabled()) {
+        if (mAttachInfo.mHardwareRenderer == null) {
             return false;
         }
         mAttachInfo.mHardwareRenderer.invokeFunctor(functor, waitForCompletion);