AudioTrackPositionTracker returns negative timestamps after reset

[tonihei]

[REQUIRED] Issue description

AudioTrackPositionTracker sometimes returns a negative timestamps immediately after a reset (e.g. at the start of playback, or after a seek). This causes the rendererPositionUs in ExoPlayerImplInternal to be negative, which in turn violates other assumptions the player and the renderers make about the position. This issue was originally reported in #7449. The PR proposed a workaround for this problem for the total buffered duration specifically, but it should ideally be fixed closer to the root cause.

[REQUIRED] Reproduction steps

Play "Apple TS media playlist" in the demo app and add logging similar to this one. The issue doesn't happen after all resets, but only occasionally.

[REQUIRED] Link to test content

"Apple TS media playlist" in the demo app

[REQUIRED] A full bug report captured from the device

Not relevant.

[REQUIRED] Version of ExoPlayer being used

dev-v2

[REQUIRED] Device(s) and version(s) of Android being used

Pixel 4, Android 11. Probably unrelated.

[ojw28]

Should be fixed by the commit ref'd above.