Revert "Revert "Add more support for transformed clip rects and paths""

This reverts commit a8557d2169e14997637f57bc897640c8882d4a46.

Change-Id: I36d4883d548fc47ba6c0b4a42012107d0d2f85a6
diff --git a/libs/hwui/Android.mk b/libs/hwui/Android.mk
index 1947c32..c3a07a1 100644
--- a/libs/hwui/Android.mk
+++ b/libs/hwui/Android.mk
@@ -28,6 +28,7 @@
 		SkiaColorFilter.cpp \
 		SkiaShader.cpp \
 		Snapshot.cpp \
+		Stencil.cpp \
 		TextureCache.cpp \
 		TextDropShadowCache.cpp