PlayerControlView time position not being initialized to 0:00 in ExoPlayer r2.15.1
Reproduction:

1. Change the demo app to use PlayerControlView instead of StyledPlayerControlView.
2. Open a video. See that the timestamp is blank instead of starting at 0:00.

This appears to be a regression in 86f8c4e44e5467cb9d3b79dcf0593903ddd58422 / dd33afb33508018a2734ebbc65eb34b179259983 from fixing #9111 

diff --git a/library/ui/src/main/java/com/google/android/exoplayer2/ui/PlayerControlView.java b/library/ui/src/main/java/com/google/android/exoplayer2/ui/PlayerControlView.java
index 7035372b32..24dbde6a72 100644
--- a/library/ui/src/main/java/com/google/android/exoplayer2/ui/PlayerControlView.java
+++ b/library/ui/src/main/java/com/google/android/exoplayer2/ui/PlayerControlView.java
@@ -343,8 +343,8 @@ public class PlayerControlView extends FrameLayout {
   private long[] extraAdGroupTimesMs;
   private boolean[] extraPlayedAdGroups;
   private long currentWindowOffset;
-  private long currentPosition;
-  private long currentBufferedPosition;
+  private long currentPosition = C.POSITION_UNSET;
+  private long currentBufferedPosition = C.POSITION_UNSET;
 
   public PlayerControlView(Context context) {
     this(context, /* attrs= */ null);
['library/ui/src/main/java/com/google/android/exoplayer2/ui/PlayerControlView.java']