AudioRecord: Add client side track id for logging

Test: Audio sanity test, check logcat
Bug: 115400221
Change-Id: Ifa9c05c0df66e372e773b5149a0f1ed49a21ef3a
diff --git a/services/audioflinger/AudioFlinger.cpp b/services/audioflinger/AudioFlinger.cpp
index f299d83..7db7d9f 100644
--- a/services/audioflinger/AudioFlinger.cpp
+++ b/services/audioflinger/AudioFlinger.cpp
@@ -1808,6 +1808,7 @@
 
     output.cblk = recordTrack->getCblk();
     output.buffers = recordTrack->getBuffers();
+    output.trackId = recordTrack->id();
 
     // return handle to client
     recordHandle = new RecordHandle(recordTrack);