With a [previous change](f05e6a7d6e), we makes `hasPendingData()` return `false` once we've found that the `AudioTrack` has played out all the written frames, to avoid it permanently stays `true` even when the source has ended. However, this is aggressive as the audio output device can still have latency in playing out those frames. So `hasPendingData()` should stay `true` a bit longer (for the duration of `latencyUs`) until finally turn to `false`, as well as the `getCurrentPositionUs()` should increment smoothly without a jump for the duration of `latencyUs`.
PiperOrigin-RevId: 738004292
(cherry picked from commit 6470c97af415d91ad46a1f21c7f2ab5b0716f39c)
bd104b1cc4