SDK / exoplayer

- This should be a no-op change
- Inline attemptRestart
- Clean up processing of pending seeks

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=139804630

Issue #2016

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=139803888

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=139803684

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=139797714

- Make handleSourceInfoRefreshed clearer.
- Remove bufferAheadPeriodCount. Seems error prone.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=139774580

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=139738429

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=139626848

Issue: #2081

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=139566990

This is techically not allowed by the spec[1] but might still occur in
certain scenarios. New playlists with older media sequence numbers are
ignored.

[1]: HLS draft version 20, section-6.2.1

Issue:#2059

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=139564889

continueLoading shouldn't return true unless it's done
something. Always returning true if endOfStream was
causing CompositeSequenceableLoader.continueLoading to
loop forever.

It looks like the same issue exists in ChunkSampleStream
as well, although I can't seem to provoke DASH or SS
playbacks into doing anything bad as a result.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=139559834

ReusableBufferedOutputStream is a subclass of BufferedOutputStream with a reset(OutputStream) that allows an instance to be re-used with another underlying output stream.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=139505999

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=139453745

I'll have a more thorough refactor of some of this class
fairly soon!

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=139451693

Issue: #2077

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=139451511

Use BufferedOutputStream and BufferedInputStream while writing / reading.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=139446039

Issue:#87

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=139443476

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=139381958

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=139377417

Issue:#2059

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=139331670

This is used by Quicktime for MP3 tracks.

Issue: #2066

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=139209989

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=139204000

This removes duplication from SimpleDecoderAudioRenderer and
MediaCodecAudioRenderer.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=139187254

Reset RenderedFirstFrame when setting OuputBufferRenderer.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=139100783

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=139064912

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=138871293

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=138860196

Clean up AtomicFile and make it return a custom FileOutputStream
for writing which handles IOException automatically during write
operations.

It also syncs the file descriptor and deletes the backup file on
close() call. This fixes the order of flush and close operations
when the fileoutputstream is wrapped by another OutputStream.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=138779187

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=138759164

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=138758739

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=138758504

Issue: #2034

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=138698239

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=138687623

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=138652561

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=138628300

This can be used by the app for showing arbitrary UI on top of the player (for
example, UI elements associated with an ad).

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=138610733

These variables are never read, since the underlying control
view reads them directly from the attrs.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=138528246

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=138493584

This fixes VOD->Live transitions, with the caveat that
the Live portion still ends up further behind the live
edge than intended. This will be fixed in a following
change.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=138407066

This change fixes the race condition where the internal
timeline is different to the externally visible timeline
when a seek is performed. We now resolve the seek position
using the externally visible timeline, then adjust the
period index as required for the internal timeline. If the
period is missing we follow similar logic for the existing
case where the playing period is removed.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=138402076