Remove obsolete references to libmedia_native

Bug: 6654403
Change-Id: I05d8e81fd31617b587fd1228a303c40db83e7f2d
diff --git a/jni/rtp/Android.mk b/jni/rtp/Android.mk
index 82d7912..b265cdd 100644
--- a/jni/rtp/Android.mk
+++ b/jni/rtp/Android.mk
@@ -37,7 +37,6 @@
 	libcutils \
 	libutils \
 	libmedia \
-	libmedia_native \
 	libstagefright_amrnb_common
 
 LOCAL_STATIC_LIBRARIES := libgsm libstagefright_amrnbdec libstagefright_amrnbenc