Adds onPlaybackRateChange info to README

Fix Android audio crash fixes Issue #1417

Why:

* There is a case where groupIndex may be unset

This change addresses the need by:

* Don't chain check for INDEX_UNSET to previous conditional

1319 - fullscreen rotation issues with iOS built-in controls

Fix tvOS picture-in-picture compilation regression.

Adding compileOptions Java 1.8 to build.gradle

fix: access on undefined variable

Implement picture in picture for iOS

Instead of crashing, show a warning and return

Throw an error instead of crashing app when video source is empty

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