Remove test library and instrumentation defs from Browser.

See bug 1900802.
diff --git a/Android.mk b/Android.mk
index 02ba333..33cd6ab 100644
--- a/Android.mk
+++ b/Android.mk
@@ -3,10 +3,6 @@
 
 LOCAL_MODULE_TAGS := user
 
-# TODO: Remove dependency of application on the test runner (android.test.runner) 
-# library.
-LOCAL_JAVA_LIBRARIES := android.test.runner
-
 LOCAL_STATIC_JAVA_LIBRARIES := google-framework
 
 LOCAL_SRC_FILES := $(call all-subdir-java-files)
@@ -14,3 +10,6 @@
 LOCAL_PACKAGE_NAME := Browser
 
 include $(BUILD_PACKAGE)
+
+# additionally, build tests in sub-folders in a separate .apk
+include $(call all-makefiles-under,$(LOCAL_PATH))