Remote submix: replace include path with module dependency

The include path was needed because libnbaio_mono was missing
an include export for libaudioutils headers.

Test: make
Change-Id: I6d6aa2826ed259b682e8a417557fb6fdfb3caea6
diff --git a/modules/audio_remote_submix/Android.bp b/modules/audio_remote_submix/Android.bp
index c7d018c..f7b5c14 100644
--- a/modules/audio_remote_submix/Android.bp
+++ b/modules/audio_remote_submix/Android.bp
@@ -17,9 +17,6 @@
     relative_install_path: "hw",
     vendor: true,
     srcs: ["audio_hw.cpp"],
-    include_dirs: [
-        "system/media/audio_utils/include",
-    ],
     shared_libs: [
         "liblog",
         "libcutils",