[3253328, 3171580] Treat GONE and INVISIBLE views the same when calculating transparent regions

We only used to check for INVISIBLE, which prevented some Surfaceview
optimization to take place.

Change-Id: I244b54696d861a022ca1c334ff61ab7efb899587

Author: pixelflinger

core/java/android/view/ViewGroup.java

@@ -3304,7 +3304,7 @@ public boolean gatherTransparentRegion(Region region) {
         boolean noneOfTheChildrenAreTransparent = true;
         for (int i = 0; i < count; i++) {
             final View child = children[i];
-            if ((child.mViewFlags & VISIBILITY_MASK) != GONE || child.getAnimation() != null) {
+            if ((child.mViewFlags & VISIBILITY_MASK) == VISIBLE || child.getAnimation() != null) {
                 if (!child.gatherTransparentRegion(region)) {
                     noneOfTheChildrenAreTransparent = false;
                 }