Add `HlsMediaSource.Factory.setTimestampAdjusterInitializationTimeoutMs(long)` to set the timeout for the loading thread to wait for the `TimestampAdjuster` to initialize. If the initialization doesn't complete before the timeout, a `PlaybackException` is thrown to avoid the playback endless stalling. The timeout is set to zero by default.
This can avoid HLS playback endlessly stalls when manifest has missing discontinuities. According to the HLS spec, all variants and renditions have discontinuities at the same points in time. If not, the one with discontinuities will have a new `TimestampAdjuster` not shared by the others. When the loading thread of that variant is waiting for the other threads to initialize the timestamp and hits the timeout, the playback will stall.
Issue: androidx/media#323
#minor-release
PiperOrigin-RevId: 539108886
db3e662bdc