[Closed Captioning] Create SubRip file parser and dart closed caption…

… data object (flutter#2473)

This PR specifies a dart object that represents a "Closed Caption". This will be useful in a follow up PR, where I will add closed caption support the the `VideoPlayerController`.

[path_provider] now supports getDownloadsDirectory() on macOS. (flutt…

…er#2436)

Adds support for retrieving a user's downloads directory on macOS using the path_provider plugin.

[video_player_web, video_player] Detect DOM playback/init errors and …

…convert them to PlatformExceptions (flutter#2483)

video_player_web:

* Add a `PlatformException` to the event Stream `onError`, instead of the Event coming straight from the DOM.
* Handle videoElement.play() rejection. Funnel that as a PlatformException to the event Stream as well.
* Update documentation about web-specific _quirks and features_.

video_player:

* Add documentation about the web platform.

[video_player_web, video_player] Detect DOM playback/init errors and …

…convert them to PlatformExceptions (flutter#2483)

video_player_web:

* Add a `PlatformException` to the event Stream `onError`, instead of the Event coming straight from the DOM.
* Handle videoElement.play() rejection. Funnel that as a PlatformException to the event Stream as well.
* Update documentation about web-specific _quirks and features_.

video_player:

* Add documentation about the web platform.

Fix ci error: deprecated api (flutter#2485)

[video_player_web, video_player] Detect DOM playback/init errors and …

…convert them to PlatformExceptions (flutter#2483)

video_player_web:

* Add a `PlatformException` to the event Stream `onError`, instead of the Event coming straight from the DOM.
* Handle videoElement.play() rejection. Funnel that as a PlatformException to the event Stream as well.
* Update documentation about web-specific _quirks and features_.

video_player:

* Add documentation about the web platform.

Fix ci error: deprecated api (flutter#2485)

[In_app_purchases] Removing extra testing changes for in-app-purchase…

… example (flutter#2481)

[In_app_purchases] Removing extra testing changes for in-app-purchase…

… example (flutter#2481)

[shared_preferences] Fixes gradle version for shared preferences (mac…

…os, web) bug on android (flutter#2470)

For some reason the version of gradle inside the android folders of the "sub packages" is different than the real one on the real shared_preferences plugin.

Even though my project only depends on the main package, I get an error when I try to run it: