fix: remove runtime warning by replacing `UIManager.RCTVideo` with `UIManager.getViewManagerConfig('RCTVideo')` (and ensuring backwards compat) (#1487)

* replaced UIManager.RCTVideo >  UIManager.getViewManagerConfig('RCTVideo')

* added requested changes

* updated changelog.md

* docs: adjust wording

* fix(ios): message sent to deallocated instance

* chore: update changelog

Feature Implementation: Recovery from transient internet failures

I'm guessing this change was made to cleanup the code, however it is not functionally identical and may cause issues. Revert until those can be discussed.

Support for displaying controls in Android Exoplayer

Defect fix: https://github.com/react-native-community/react-native-video/issues/1460

updated changelog for PR 1448

Doc modifications as per alplabetical order

Gradle changes reverted back

Doc changes for retry count implementation

Feature implementation: Failure Retry Count

Exoplayer gradle changes

Merge from master to my fork

Fix Array Out of Bounds crash if no video tracks present