AudioFlinger: Change track ready condition in STOPPING_1 state

Set FS_FILLED only if framesReady() > 0

Change-Id: Ibb1d2e988ff17fcf3a7ab61031a3f85df82f18d5
diff --git a/services/audioflinger/Tracks.cpp b/services/audioflinger/Tracks.cpp
index c90bae0..c5fa624 100644
--- a/services/audioflinger/Tracks.cpp
+++ b/services/audioflinger/Tracks.cpp
@@ -571,8 +571,10 @@
         return true;
     }
 
-    if (isStopping() && framesReady() > 0) {
-        mFillingUpStatus = FS_FILLED;
+    if (isStopping()) {
+        if (framesReady() > 0) {
+            mFillingUpStatus = FS_FILLED;
+        }
         return true;
     }