audioflinger: OffloadThread fix for resume underrun

AudioFlinger can miss resuming h/w on a pause->resume transition
if sufficient data isn't available

Bug: 11358524.
Change-Id: Ic3c75256290d3515fd4a96dfcc900909fbe5bc15
diff --git a/services/audioflinger/Tracks.cpp b/services/audioflinger/Tracks.cpp
index c5fa624..9fe459b 100644
--- a/services/audioflinger/Tracks.cpp
+++ b/services/audioflinger/Tracks.cpp
@@ -1020,9 +1020,13 @@
 
     if (mState == RESUMING)
         mState = ACTIVE;
+
     // Other possibility of  pending resume is stopping_1 state
     // Do not update the state from stopping as this prevents
-    //drain being called.
+    // drain being called.
+    if (mState == STOPPING_1) {
+        mResumeToStopping = false;
+    }
 }
 // ----------------------------------------------------------------------------