Add android.hardware.audio.output for Android TV devices.

Bug: 17487731
Change-Id: If16fc3f6b70ff6c1871c3bf025111d516669679d
diff --git a/tv_core_hardware.xml b/tv_core_hardware.xml
index e687695..7ea515f 100644
--- a/tv_core_hardware.xml
+++ b/tv_core_hardware.xml
@@ -20,6 +20,7 @@
          include.  Devices with optional hardware must also include extra hardware
          files.
     -->
+    <feature name="android.hardware.audio.output" />
     <feature name="android.hardware.location" />
     <feature name="android.hardware.location.network" />
     <feature name="android.hardware.screen.landscape" />