This PR adds support for DRM streams on iOS (Fairplay) and Android (Playready, Widevine, Clearkey)

I am neither Android nor iOS developer, so feel free to provide feedback to improve this PR.

**Test stream for ANDROID:**
```
testStream = {
        uri: 'http://profficialsite.origin.mediaservices.windows.net/c51358ea-9a5e-4322-8951-897d640fdfd7/tearsofsteel_4k.ism/manifest(format=mpd-time-csf)',
        type: 'mpd',
        drm: {
            type: DRMType.PLAYREADY,
            licenseServer: 'http://test.playready.microsoft.com/service/rightsmanager.asmx?cfg=(persist:false,sl:150)'
        }
    };
```

or 
```
{
    uri: 'https://media.axprod.net/TestVectors/v7-MultiDRM-SingleKey/Manifest_1080p.mpd',
    drm: {
        type: 'widevine', //or DRMType.WIDEVINE
        licenseServer: 'https://drm-widevine-licensing.axtest.net/AcquireLicense',
        headers: {
            'X-AxDRM-Message': 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ2ZXJzaW9uIjoxLCJjb21fa2V5X2lkIjoiYjMzNjRlYjUtNTFmNi00YWUzLThjOTgtMzNjZWQ1ZTMxYzc4IiwibWVzc2FnZSI6eyJ0eXBlIjoiZW50aXRsZW1lbnRfbWVzc2FnZSIsImZpcnN0X3BsYXlfZXhwaXJhdGlvbiI6NjAsInBsYXlyZWFkeSI6eyJyZWFsX3RpbWVfZXhwaXJhdGlvbiI6dHJ1ZX0sImtleXMiOlt7ImlkIjoiOWViNDA1MGQtZTQ0Yi00ODAyLTkzMmUtMjdkNzUwODNlMjY2IiwiZW5jcnlwdGVkX2tleSI6ImxLM09qSExZVzI0Y3Iya3RSNzRmbnc9PSJ9XX19.FAbIiPxX8BHi9RwfzD7Yn-wugU19ghrkBFKsaCPrZmU'
        },
    }
}
```

**Test stream for iOS:**
Sorry but I can not provide free streams to test. If anyone can provide test streams, or found some we can use, please let me know to also test them.

It has been tested with a private provider and they work, at least with the `getLicense` override method. (An example implementation is provided in the README)

* Fix exoplayer aspect ratio update on source changes

* Update CHANGELOG.md

* Add flag on iOS

* Add flag in Android

* Add documentation

* Add changelog entry

* Also set setKeepScreenOn

* Fix prop not being set

* add preventsDisplaySleepDuringVideoPlayback to exoplayer

* Update android-exoplayer/src/main/java/com/brentvatne/exoplayer/ReactExoplayerView.java

* Update android-exoplayer/src/main/java/com/brentvatne/exoplayer/ReactExoplayerView.java

Co-authored-by: Jens Andersson <jens@fritan.com>

Co-authored-by: Anton Tanderup <antontandrup@gmail.com>
Co-authored-by: Jens Andersson <jens@fritan.com>

* added trackId to exoplayer onLoad callback

* added trackInfo to bandwidth callback

* syntax fix

* syntax fix

* version update

* sending complete logcat for media playback exception ExoPlaybackException

* version bump

* package publish changes

* Live playback fix

* Version bump

* import fix

* version bump

* configurable preferredForwardBufferDuration

* configurable preferredForwardBufferDuration

* version update

* Exposing time

* exo player window current tsp

* return type

* Current window timestamp in epoch

* iOS changes

* version update

* Updated package.json

* updated version

* CurrentTime bug fix

* Updated package.json

* Updated currentPlaybackTime

* Updated currentPlayback logic

* Updated package.json

* Bug fix

* Added semicolon

* updated package.json

* Updated ReactVideoView

* updated verison

* Revert package.json changes

* Update ReactVideoView.java

* Use standard log

* Document preferredForwardBufferDuration (iOS)

* Document currentPlaybackTime

* Document trackId

* Update CHANGELOG.md

* Update CHANGELOG.md

* Update README.md

* Update CHANGELOG.md

Co-authored-by: anubansal <anu.bansal@curefit.com>
Co-authored-by: Sivakumar J <sivakumar@curefit.com>
Co-authored-by: parikshit <parikshit@curefit.com>
Co-authored-by: anubansal92 <40559524+anubansal92@users.noreply.github.com>
Co-authored-by: Rishu Agrawal <rishu.agrawal@v.curefit.com>
Co-authored-by: rishu-curefit <54575330+rishu-curefit@users.noreply.github.com>

this fixes the case on any time you have a react view that displays the video, but it's being rendered with controls but not as a full screen (ie. easily reproducible when you have a tabbar for instance - the reactViewController.view frame shouldnt be the whole screen bounds).