Clean up libaudioclient includes

Test: build
Change-Id: I1b2cd96e99564cd3944aa20a36207bd91287f7c8
diff --git a/media/extractors/mpeg2/Android.bp b/media/extractors/mpeg2/Android.bp
index f4c277c..1d9e1e6 100644
--- a/media/extractors/mpeg2/Android.bp
+++ b/media/extractors/mpeg2/Android.bp
@@ -24,6 +24,7 @@
     ],
 
     header_libs: [
+        "libaudioclient_headers",
         "libbase_headers",
         "libstagefright_headers",
         "libmedia_headers",