RecordThread::createRecordTrack_l use flags for fast tracks

Look at client's request for a fast track in the flags parameter,
and check whether the request can be satisfied.

Change-Id: I65ddaeb1b85670fe9066076f638bfed0cda01c0d
diff --git a/services/audioflinger/Threads.h b/services/audioflinger/Threads.h
index 1453698..31d5323 100644
--- a/services/audioflinger/Threads.h
+++ b/services/audioflinger/Threads.h
@@ -879,6 +879,7 @@
            void handleSyncStartEvent(const sp<SyncEvent>& event);
 
     virtual size_t      frameCount() const { return mFrameCount; }
+            bool        hasFastRecorder() const { return false; }
 
 private:
             void clearSyncStartEvent();