audioflinger: update track ready condition

Signal track ready if the track isStopping().

Bug: 12423190
Change-Id: I95e14905df10ebf301e398263478c8ca25d7e2ce
diff --git a/services/audioflinger/Tracks.cpp b/services/audioflinger/Tracks.cpp
index af04ce7..d6b9908 100644
--- a/services/audioflinger/Tracks.cpp
+++ b/services/audioflinger/Tracks.cpp
@@ -551,7 +551,7 @@
 
 // Don't call for fast tracks; the framesReady() could result in priority inversion
 bool AudioFlinger::PlaybackThread::Track::isReady() const {
-    if (mFillingUpStatus != FS_FILLING || isStopped() || isPausing()) {
+    if (mFillingUpStatus != FS_FILLING || isStopped() || isPausing() || isStopping()) {
         return true;
     }