Enable FastTrack timestamps

Bug: 26413951
Change-Id: Id54c32cb0f0be83d443f6cf1007181ebc461c586
diff --git a/services/audioflinger/Threads.cpp b/services/audioflinger/Threads.cpp
index 5aff394..4807400 100644
--- a/services/audioflinger/Threads.cpp
+++ b/services/audioflinger/Threads.cpp
@@ -6157,7 +6157,7 @@
 
             // update frame information and push timestamp out
             activeTrack->updateTrackFrameInfo(
-                    activeTrack->mAudioRecordServerProxy->framesReleased(),
+                    activeTrack->mServerProxy->framesReleased(),
                     mTimestamp.mPosition[ExtendedTimestamp::LOCATION_SERVER],
                     mSampleRate, mTimestamp);
         }