SDK / exoplayer

If available parse and use spherical metadata:
https://github.com/google/spatial-media/blob/master/docs/spherical-video-v2-rfc.md

RELNOTES=true

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=209754080

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=209752603

The previous change was too aggressive as it would clear future ad breaks.

Still clear the pending content position so the real content position is
reported after an empty ad break.

Issue: #4681
Issue: #4622

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=209752306

Some tests were flaky because of the PlayUntilPosition action which called
player.setPlayWhenReady from the wrong thread. Also fixed some other misc
flakiness.

ExoPlayerTest seems to be non-flaky now (tested with 10000 runs).

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=209743076

The options menu is not available on Android TV, which triggers a
null pointer exception whenever a sample is chosen.

This CL is a temporary fix until we rework the UI to not use
an options menu.

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Issue:#4666

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They don't need to be accessed publicly and are can be moved into the
respective chunk sources. This is the same structure used for Dash.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=209507217

The MediaPeriodId with index is only properly defined together with a
timeline containing the index. Changing it to the period uid allows to use
the MediaPeriodId independent of the corresponding timeline.

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MOE_MIGRATED_REVID=209430257

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MOE_MIGRATED_REVID=209417004

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MOE_MIGRATED_REVID=209414373

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MOE_MIGRATED_REVID=209412403

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MOE_MIGRATED_REVID=209396260

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MOE_MIGRATED_REVID=209390036

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=209193233

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MOE_MIGRATED_REVID=209152304

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MOE_MIGRATED_REVID=209134753

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Created by MOE: https://github.com/google/moe
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The reason for the change is that variable substititution requires
master playlist variable definitions at the moment of parsing.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=208997963

Issue: https://github.com/google/ExoPlayer/issues/4493

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=208992790

feat(playlist): remove MediaSource range

WebvttExtractor: make public to allow create custom HlsExtractorFactory outside of library

#4304 - Add option to show buffering view when setPlayWhenReady is false

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=208977806

Issue: #4532

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MOE_MIGRATED_REVID=208968252

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=208796064

When playing a playlist where the exact maximum input size is known from the
container for each item, it may be necessary to recreate the decoder to increase
its maximum input buffer size at the point of transitioning from one item to the
next, which can make transitions non-seamless.

Scale up the initial video decoder maximum input size so playlist item
transitions with small increases in maximum sample size don't require
reinitialization.

Issue: #4510

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MOE_MIGRATED_REVID=208650244

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Also turn on nullity checks for ExtractorMediaPeriod.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=208467644

Merge branch 'fix/vectorArtWork' of https://github.com/mitrejcevski/ExoPlayer into mitrejcevski-fix/vectorArtWork

Also fix an NPE in FfmpegAudioRenderer if sampleMimeType wasn't set.

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MOE_MIGRATED_REVID=208230947

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=208208099

Apps targeting API 28 by default do not grant permission for cleartext traffic,
so update the demo app to show a warning if loading an HTTP URI will fail. See
https://developer.android.com/about/versions/pie/android-9.0-changes-28 for
information on behavior changes in API 28.

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