SDK / exoplayer

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=138082864

A VOD-style period in a dynamic manifest would result in a NullPointerException.
Also fix another issue in which an unrecognized mime type would also result in
NullPointerException.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=138075137

In order to expose the live window, it is necessary (unlike before) to refresh
the live playlists being played periodically so as to know where the user can
seek to. For this, the HlsPlaylistTracker is added, which is basically a map
from HlsUrl's to playlist. One of the playlists involved in the playback will
be chosen to define the live window. The playlist tracker it periodically.
The rest of the playilst will be loaded lazily. N.B: This means that for VOD,
playlists are not refreshed at all. There are three important features missing
in this CL(that will be added in later CLs):

* Blacklisting HlsUrls that point to resources that return 4xx response codes.
    As per [Internal: b/18948961].
* Allow loaded chunks to feed timestamps back to the tracker, to fix any
    drifting in live playlists.
* Dinamically choose the HlsUrl that points to the playlist that defines the
    live window.

Other features:
--------------

The tracker can also be used for keeping track of discontinuities. In the case
of single variant playlists, this is particularly useful. Might also work if
there is a that the live playlists are aligned (but this is more like working
around the issue, than actually solving it). For this, see [Internal: b/32166568]
and [Internal: b/28985320].

Issue:#87

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=138054302

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=137932100

- Use A/V tracks only for buffering position when available
  in ExtractorMediaPeriod.
- Fix layering of exo_simple_player_view so that subtitles
  are above album art. The test stream provided has both.
- Make album art in SimpleExoPlayer view respect the resize
  mode, like we do for video.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=137698473

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=137697023

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=137406773

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=137392736

Merge ID3 support into dev-v2

TrackSelector no longer has a listener. Instead, tracks
change events are reported through ExoPlayer.EventListener.
Applications interested in retrieving the selection info
should retrieve it directly from the TrackSelector by
calling an exposed getter.

Pretty sure the ref'd issue is fixed as a side effect of
this change.

Issue: #1942

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=137183073

Unlike with PesReaders, sections don't have a standard way
of providing timestmaps or even generating tracks. We need
to pass this information so that readers decide what to do
with it.

Issue:#726

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=137162494

This allows the user to create section readers(usually) for reserved pids,
like SDT, EIT, CAT, etc.

Issue:#726

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=137150853

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=137145209

Issue: #1991

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=137131819

Issue: #1976

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=137044583

Issue: #1986

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=137035576

Code coverage is disabled in V2 to workaround
https://code.google.com/p/android/issues/detail?id=226070

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=137032839

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=137011920

Issue:#1966

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=136836332

SectionPayloadReaders are provided to a SectionReader to
get whole sections(crc checked). This allows the injection
of custom section readers. E.G: SCTE35 messages.

Issue:#726

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=136816612

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=136710546

In this CL:

* PesReader moves out of TsExtractor and becomes public.
* ElementaryStreamReaderFactory becomes TsPayloadReaderFactory and is
    moved to TsPayloadReader.
* The TsPayloadReaderFactory is in charge of wrapping any
    ElementaryStreamReaders with a PesReader.

Incoming:
* Extract SectionReader supperclass (analog to PesReader, but for
    sections) from Pat and Pmt readers.
* Add a ScteReader, wrapped by a section reader, and include it in
    the DefaultTsPayloadReaderFactory.

Issue:#726

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=136707706

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=136702598

Fix NPE in TsExtractor when ElementaryStreamReaderFactory returns null

pesPayloadReader can be null here because DefaultStreamReader.init() can return null on unknown streamId. If we have a junk transport stream in our content an exception will be thrown.

Update dev-v2-id3

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=136697697

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=136607848

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=136597149