Properly clear textures for Hardware Bitmaps

Test: manual  (Description in the bug)
bug:34858530
Change-Id: I13eb89077c43ca28436509a7af5b7c11374446c4
diff --git a/libs/hwui/Android.mk b/libs/hwui/Android.mk
index 138a5ef..a799fdf 100644
--- a/libs/hwui/Android.mk
+++ b/libs/hwui/Android.mk
@@ -316,6 +316,7 @@
     tests/unit/StringUtilsTests.cpp \
     tests/unit/TestUtilsTests.cpp \
     tests/unit/TextDropShadowCacheTests.cpp \
+    tests/unit/TextureCacheTests.cpp \
     tests/unit/VectorDrawableTests.cpp \
 
 include $(LOCAL_PATH)/hwui_static_deps.mk