[video_player_android] Migrate ExoPlayer to ExoPlayer-Media3 1.3.1

[emakar]

Resolves #130272

Migrated with https://developer.android.com/media/media3/exoplayer/migration-guide#usingscript

Pre-launch Checklist

• I read the [Contributor Guide] and followed the process outlined there for submitting PRs.
• I read the [Tree Hygiene] wiki page, which explains my responsibilities.
• I read and followed the [relevant style guides] and ran the auto-formatter. (Unlike the flutter/flutter repo, the flutter/packages repo does use dart format.)
• I signed the [CLA].
• The title of the PR starts with the name of the package surrounded by square brackets, e.g. [shared_preferences]
• I [linked to at least one issue that this PR fixes] in the description above.
• I updated pubspec.yaml with an appropriate new version according to the [pub versioning philosophy], or this PR is [exempt from version changes].
• I updated CHANGELOG.md to add a description of the change, [following repository CHANGELOG style].
• I updated/added relevant documentation (doc comments with ///).
• I added new tests to check the change I am making, or this PR is [test-exempt].
• All existing and new tests are passing.

[camsim99]

Looks good!! Left a couple of thoughts.

[emakar]

Hm, this test is now failing accidentally

══╡ EXCEPTION CAUGHT BY FLUTTER TEST FRAMEWORK ╞════════════════════════════════════════════════════
The following TestFailure was thrown running a test:
Expected: a value greater than Duration:<0:00:00.000000>
  Actual: Duration:<0:00:00.000000>
   Which: is not a value greater than Duration:<0:00:00.000000>

When the exception was thrown, this was the stack:
#4      main.<anonymous closure>.<anonymous closure> (file:///b/s/w/ir/x/w/packages/packages/video_player/video_player_android/example/integration_test/video_player_test.dart:71:7)
<asynchronous suspension>
#5      testWidgets.<anonymous closure>.<anonymous closure> (package:flutter_test/src/widget_tester.dart:183:15)
<asynchronous suspension>
#6      TestWidgetsFlutterBinding._runTestBody (package:flutter_test/src/binding.dart:1025:5)
<asynchronous suspension>
<asynchronous suspension>
(elided one frame from package:stack_trace)

This was caught by the test expectation on the following line:
  file:///b/s/w/ir/x/w/packages/packages/video_player/video_player_android/example/integration_test/video_player_test.dart line 71
The test description was:
  can be played

[stuartmorgan]

Thanks for all the iteration on this to put the plugin on a more stable API foundation!

A couple of minor comments, and @camsim99 will need to re-review as well, but this has my LGTM.

[emakar]

thanks for the review!

[stuartmorgan]

Thanks!

[emakar]

@camsim99 could you please review this?

[camsim99]

This looks good to me!