Change v7 support toolbar to Toolbar

With this change we now extend activity instead of
ActionBarActivity (which extends AppCompatActivity, etc.). This is necessary to use ActivityInstrumentationTestCase2 in tests
Bug:27843836
Change-Id: I1834366744f04d56706a9db4814fb79199c07b26
diff --git a/Android.mk b/Android.mk
index 495dca2..9259ff3 100644
--- a/Android.mk
+++ b/Android.mk
@@ -53,3 +53,5 @@
 LOCAL_PRIVILEGED_MODULE := true
 
 include $(BUILD_PACKAGE)
+
+include $(call all-makefiles-under,$(LOCAL_PATH))