List Java Instru Test Information From JUnit Runner

testing/android/proguard_for_test.flags

 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # This file is for proguard flags which are applied to the combined test and
 # tested code. Do not put any flags in this file which might affect the
 # correctness of the .apk we are testing, since it will apply to that .apk as
 # well.
 
 # Keep all junit3 tests
@@ skipping 12 matching lines @@
     *;
 }
 
 # Keep any enum's value and valueOf method since they are reflectively called
 # from JUnit4 runner
 -keepclassmembers enum * {
     public static **[] values();
     public static ** valueOf(java.lang.String);
 }
 
+# Keey any annotation used by tests for instrumentation runner to list out 
+# test annotation information
+-keep @interface android.support.test.**
+-keep @interface org.chromium.base.test.**
+-keep @interface org.junit.**
+-keep @interface android.test.**
+
+-keepattributes *Annotation*
+
 # We have some "library class WebView depends on program class SslCertificate"
 # warnings, and they don't affect us.
 -dontwarn android.webkit.WebView*