Add tests for CarrierConfig app.

These tests check that all asset XML files can be parsed into bundles
and that they use valid filter attributes.

Bug: b/21619172
Change-Id: I4242f77c3c7e8b0e2027bca164f7276b89bbcfb1
diff --git a/Android.mk b/Android.mk
index 40744ed..e6a9f2d 100644
--- a/Android.mk
+++ b/Android.mk
@@ -1,7 +1,7 @@
 LOCAL_PATH:= $(call my-dir)
 include $(CLEAR_VARS)
 
-LOCAL_SRC_FILES := $(call all-subdir-java-files)
+LOCAL_SRC_FILES := $(call all-java-files-under, src)
 
 LOCAL_JAVA_LIBRARIES := telephony-common
 
@@ -13,3 +13,5 @@
 
 include $(BUILD_PACKAGE)
 
+# This finds and builds the test apk as well, so a single make does both.
+include $(call all-makefiles-under,$(LOCAL_PATH))