Support testing for resource shrinking

Add a simple test and add necessary mock dependencies to allow future
resoure shrinking use with platform targets.

Test: m
Bug: 202959019
Change-Id: Id2dd44d52ce5ea62c06784caab0af6276248cb3f
diff --git a/java/Android.bp b/java/Android.bp
index 8510e04..1c3aed9 100644
--- a/java/Android.bp
+++ b/java/Android.bp
@@ -101,6 +101,7 @@
         "plugin_test.go",
         "prebuilt_apis_test.go",
         "proto_test.go",
+        "resourceshrinker_test.go",
         "rro_test.go",
         "sdk_test.go",
         "sdk_library_test.go",