Don't apply AA to rects with no rotation/perspective.

Change-Id: I21138d4d0589cc28f1dcffb8b675cd81a9900e24
diff --git a/libs/hwui/OpenGLRenderer.cpp b/libs/hwui/OpenGLRenderer.cpp
index 8558054..6c9c0eb 100644
--- a/libs/hwui/OpenGLRenderer.cpp
+++ b/libs/hwui/OpenGLRenderer.cpp
@@ -1478,8 +1478,7 @@
  * within that boundary region and how far into the region it is.
  */
 void OpenGLRenderer::drawAARect(float left, float top, float right, float bottom,
-        int color, SkXfermode::Mode mode)
-{
+        int color, SkXfermode::Mode mode) {
     float inverseScaleX = 1.0f;
     float inverseScaleY = 1.0f;
     // The quad that we use needs to account for scaling.
@@ -1935,7 +1934,7 @@
     }
 
     int color = p->getColor();
-    if (p->isAntiAlias()) {
+    if (p->isAntiAlias() && !mSnapshot->transform->isSimple()) {
         drawAARect(left, top, right, bottom, color, mode);
     } else {
         drawColorRect(left, top, right, bottom, color, mode);