Log for issue 2203561.

Added dump() method to AudioPolicyInterface.
diff --git a/include/hardware_legacy/AudioPolicyInterface.h b/include/hardware_legacy/AudioPolicyInterface.h
index bb4fb2a..bd3c4b1 100644
--- a/include/hardware_legacy/AudioPolicyInterface.h
+++ b/include/hardware_legacy/AudioPolicyInterface.h
@@ -123,6 +123,9 @@
     virtual status_t setStreamVolumeIndex(AudioSystem::stream_type stream, int index) = 0;
     // retreive current volume index for the specified stream
     virtual status_t getStreamVolumeIndex(AudioSystem::stream_type stream, int *index) = 0;
+
+    //dump state
+    virtual status_t    dump(int fd) = 0;
 };