Use audio_session_t consistently

Bug: 27562099
Change-Id: I328d8226191386b163f2ace41233607294c50dcd
diff --git a/services/audiopolicy/service/AudioPolicyClientImplLegacy.cpp b/services/audiopolicy/service/AudioPolicyClientImplLegacy.cpp
index a79f8ae..580d740 100644
--- a/services/audiopolicy/service/AudioPolicyClientImplLegacy.cpp
+++ b/services/audiopolicy/service/AudioPolicyClientImplLegacy.cpp
@@ -252,7 +252,7 @@
     return af->invalidateStream(stream);
 }
 
-int aps_move_effects(void *service __unused, int session,
+int aps_move_effects(void *service __unused, audio_session_t session,
                                 audio_io_handle_t src_output,
                                 audio_io_handle_t dst_output)
 {