Pass sink metadata to Bluetooth

When just microphone is enabled, i.e. for recording audio, we will
receive just sink metadata update.

Bug: 150670922
Change-Id: I795385d19e64ec5c6bc0a8549beda52da27d25a1
diff --git a/bluetooth/audio/2.2/Android.bp b/bluetooth/audio/2.2/Android.bp
index 6449c08..8d52ce9 100644
--- a/bluetooth/audio/2.2/Android.bp
+++ b/bluetooth/audio/2.2/Android.bp
@@ -14,6 +14,7 @@
     root: "android.hardware",
     srcs: [
         "types.hal",
+        "IBluetoothAudioPort.hal",
         "IBluetoothAudioProvider.hal",
         "IBluetoothAudioProvidersFactory.hal",
     ],