Work around stalled AudioTrack up to API 28

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=188173078

library/core/src/main/java/com/google/android/exoplayer2/audio/DefaultAudioSink.java

@@ -1443,7 +1443,7 @@ public final class DefaultAudioSink implements AudioSink {
         rawPlaybackHeadPosition += passthroughWorkaroundPauseOffset;
         rawPlaybackHeadPosition += passthroughWorkaroundPauseOffset;
       }
       }
 
 
-      if (Util.SDK_INT <= 26) {
+      if (Util.SDK_INT <= 28) {
         if (rawPlaybackHeadPosition == 0 && lastRawPlaybackHeadPosition > 0
         if (rawPlaybackHeadPosition == 0 && lastRawPlaybackHeadPosition > 0
             && state == PLAYSTATE_PLAYING) {
             && state == PLAYSTATE_PLAYING) {
           // If connecting a Bluetooth audio device fails, the AudioTrack may be left in a state
           // If connecting a Bluetooth audio device fails, the AudioTrack may be left in a state