Add android.test.base/stubs dependency

In preparation for the removal of the non-junit classes in the
android.test.base library from the android.jar this adds a dependency
on android.test.base/stubs to ensure this code will continue to
compile.

The following change descriptions were generated automatically and so
may be a little repetitive. They are provided to give the reviewer
enough information to check the comments match what has actually been
changed and check the reasoning behind the changes.

* Android.mk
    Added 'android.test.base.stubs' to LOCAL_JAVA_LIBRARIES because
    Browser2's will need them in order to compile once its classes are
    removed from the current SDK on which it currently depends.

Bug: 30188076
Test: make dist
Change-Id: I15823654c5cef130b759d82b80f325463f84e10c
diff --git a/Android.mk b/Android.mk
index c602a30..632286d 100644
--- a/Android.mk
+++ b/Android.mk
@@ -10,7 +10,7 @@
 
 LOCAL_STATIC_JAVA_LIBRARIES := junit
 
-LOCAL_JAVA_LIBRARIES := android.test.runner.stubs
+LOCAL_JAVA_LIBRARIES := android.test.runner.stubs android.test.base.stubs
 
 LOCAL_PACKAGE_NAME := Browser2