DO NOT MERGE libmedia: add sub resource type audio-codec and video-codec.

Bug: 20559813
Change-Id: If231cb44337ca7dc74c39fc3cd73e2b6f3cb85b8
(cherry picked from commit d4c1f6b4ecfef7323422359fc38bd1edb1abf205)
diff --git a/include/media/MediaResource.h b/include/media/MediaResource.h
index 0b57c84..20f2cad 100644
--- a/include/media/MediaResource.h
+++ b/include/media/MediaResource.h
@@ -25,6 +25,8 @@
 
 extern const char kResourceSecureCodec[];
 extern const char kResourceNonSecureCodec[];
+extern const char kResourceAudioCodec[];
+extern const char kResourceVideoCodec[];
 extern const char kResourceGraphicMemory[];
 
 class MediaResource {