audioflinger: update track ready condition

Signal track ready if the track isStopping().

Bug: 12423190
Change-Id: Ie279995d5f90fa8211a20dfbeacc1cf9b921d0bf
diff --git a/services/audioflinger/Tracks.cpp b/services/audioflinger/Tracks.cpp
index 53196c8..a5b9ac5 100644
--- a/services/audioflinger/Tracks.cpp
+++ b/services/audioflinger/Tracks.cpp
@@ -564,7 +564,7 @@
 
 // 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;
     }