expose hwui frame stats through FrameStatsObserver

Change-Id: I88884bafc8e2f6d7f67a36d3609490e83cf8afd5
diff --git a/libs/hwui/Android.mk b/libs/hwui/Android.mk
index 8ba6318..483ccf7 100644
--- a/libs/hwui/Android.mk
+++ b/libs/hwui/Android.mk
@@ -235,7 +235,8 @@
     tests/unit/LinearAllocatorTests.cpp \
     tests/unit/VectorDrawableTests.cpp \
     tests/unit/OffscreenBufferPoolTests.cpp \
-    tests/unit/StringUtilsTests.cpp
+    tests/unit/StringUtilsTests.cpp \
+    tests/unit/BufferPoolTests.cpp
 
 ifeq (true, $(HWUI_NEW_OPS))
     LOCAL_SRC_FILES += \