Clip TouchFeedbackDrawable effect to receiver Outline

Projected RenderNodes are now wrapped with a ClipRect or masked
SaveLayer, so that they are clipped to the outline of the projection
receiver surface.

Change-Id: I1d4afc1bb5d638d650bc0b1dac51a498f216773e
diff --git a/libs/hwui/Rect.h b/libs/hwui/Rect.h
index 0083b77..92964a8 100644
--- a/libs/hwui/Rect.h
+++ b/libs/hwui/Rect.h
@@ -30,6 +30,8 @@
 #define RECT_STRING "%7.2f %7.2f %7.2f %7.2f"
 #define RECT_ARGS(r) \
     (r).left, (r).top, (r).right, (r).bottom
+#define SK_RECT_ARGS(r) \
+    (r).left(), (r).top(), (r).right(), (r).bottom()
 
 ///////////////////////////////////////////////////////////////////////////////
 // Structs