SurfaceFlinger: add some layer update tests

This change adds two tests for SurfaceFlinger's behavior when updating
the position and size of a layer.

Change-Id: Id5e3ca1d7e629a3bd2c2d28275d80c7f9256d6da
diff --git a/services/surfaceflinger/tests/Android.mk b/services/surfaceflinger/tests/Android.mk
index 5053e7d..b655648 100644
--- a/services/surfaceflinger/tests/Android.mk
+++ b/services/surfaceflinger/tests/Android.mk
@@ -1 +1,40 @@
-include $(call all-subdir-makefiles)
+# Build the unit tests,
+LOCAL_PATH:= $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_MODULE := SurfaceFlinger_test
+
+LOCAL_MODULE_TAGS := tests
+
+LOCAL_SRC_FILES := \
+    Transaction_test.cpp \
+
+LOCAL_SHARED_LIBRARIES := \
+	libEGL \
+	libGLESv2 \
+	libandroid \
+	libbinder \
+	libcutils \
+	libgui \
+	libstlport \
+	libui \
+	libutils \
+
+LOCAL_C_INCLUDES := \
+    bionic \
+    bionic/libstdc++/include \
+    external/gtest/include \
+    external/stlport/stlport \
+
+# Build the binary to $(TARGET_OUT_DATA_NATIVE_TESTS)/$(LOCAL_MODULE)
+# to integrate with auto-test framework.
+include $(BUILD_NATIVE_TEST)
+
+# Include subdirectory makefiles
+# ============================================================
+
+# If we're building with ONE_SHOT_MAKEFILE (mm, mmm), then what the framework
+# team really wants is to build the stuff defined by this makefile.
+ifeq (,$(ONE_SHOT_MAKEFILE))
+include $(call first-makefiles-under,$(LOCAL_PATH))
+endif