Use audio_patch_handle_t in startAudioSource() and stopAudioSource()

Bug: 27903060
Change-Id: Iafc2095f484b74978c6f080c54f548e293bf945e
diff --git a/services/audiopolicy/AudioPolicyInterface.h b/services/audiopolicy/AudioPolicyInterface.h
index 4b32691..c60b49a 100644
--- a/services/audiopolicy/AudioPolicyInterface.h
+++ b/services/audiopolicy/AudioPolicyInterface.h
@@ -234,9 +234,9 @@
 
     virtual status_t startAudioSource(const struct audio_port_config *source,
                                       const audio_attributes_t *attributes,
-                                      audio_io_handle_t *handle,
+                                      audio_patch_handle_t *handle,
                                       uid_t uid) = 0;
-    virtual status_t stopAudioSource(audio_io_handle_t handle) = 0;
+    virtual status_t stopAudioSource(audio_patch_handle_t handle) = 0;
 
     virtual status_t setMasterMono(bool mono) = 0;
     virtual status_t getMasterMono(bool *mono) = 0;