[video_player] Added new field observeAppLifecycle to enable background playing of v…

[yogeshk25]

…ideo

Description

This PR introduces a new option to VideoPlayerOptions, which enables user to decide on whether user wants to keep playing video in the background or not.
This is a much requested feature, in many issues.

Related Issues

63836 - flutter/flutter#63836
63735 - flutter/flutter#63735
55673 - flutter/flutter#55673
48008 - flutter/flutter#48008
40722 - flutter/flutter#40722
32571 - flutter/flutter#32571

Checklist

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• I read the Contributor Guide and followed the process outlined there for submitting PRs.
• My PR includes unit or integration tests for all changed/updated/fixed behaviors (See Contributor Guide).
• All existing and new tests are passing.
• I updated/added relevant documentation (doc comments with ///).
• The analyzer (flutter analyze) does not report any problems on my PR.
• I read and followed the Flutter Style Guide.
• The title of the PR starts with the name of the plugin surrounded by square brackets, e.g. [shared_preferences]
• I updated pubspec.yaml with an appropriate new version according to the pub versioning philosophy.
• I updated CHANGELOG.md to add a description of the change.
• I signed the CLA.
• I am willing to follow-up on review comments in a timely manner.

Breaking Change

Does your PR require plugin users to manually update their apps to accommodate your change?

• Yes, this is a breaking change (please indicate a breaking change in CHANGELOG.md and increment major revision).
• No, this is not a breaking change.

[google-cla]

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[yogeshk25]

@googlebot I signed it!

[google-cla]

We found a Contributor License Agreement for you (the sender of this pull request), but were unable to find agreements for all the commit author(s) or Co-authors. If you authored these, maybe you used a different email address in the git commits than was used to sign the CLA (login here to double check)? If these were authored by someone else, then they will need to sign a CLA as well, and confirm that they're okay with these being contributed to Google.
In order to pass this check, please resolve this problem and then comment @googlebot I fixed it.. If the bot doesn't comment, it means it doesn't think anything has changed.

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[cyanglaz]

I'm going to close the PR because the CLA is not signed. Feel free to ping me when the CLA is signed and I'll re-open the PR. Or you can open a new PR after signing the CLA.

[dvasea1]

@yogeshk25 how to import this in my project?

[yogeshk25]

@dvasea1 until this is merged, you can use, following to use functionality,

  video_player:
    git:
      url: https://github.com/Yogeshk25/plugins.git
      path: packages/video_player/video_player

[IlyaMax]

@yogeshk25 why can't you just sign it?

If you authored these, maybe you used a different email address in the git commits than was used to sign the CLA (login here to double check)