com.microsoft.playready to com.microsoft.playready.recommendation mapping in HLS

[wjywbs]

Have you read the FAQ and checked for duplicate open issues?
Yes

Is your feature request related to a problem? Please describe.
com.microsoft.playready.recommendation is recommended in #818 for Windows Edge. But HLS manifest uses com.microsoft.playready as key format, and shaka uses com.microsoft.playready CDM and license server config instead of com.microsoft.playready.recommendation

#EXT-X-KEY:METHOD=SAMPLE-AES,KEYFORMAT="com.microsoft.playready"
https://docs.microsoft.com/en-us/playready/packaging/mp4-based-formats-supported-by-playready-clients?tabs=case4

Describe the solution you'd like

{
  "drm": {
    "servers": {
      "com.microsoft.playready.recommendation": "https://url"
    }
  }
}

Shaka can provide a way to map the key format in HLS, and remain compatible with DASH.

Describe alternatives you've considered

Additional context

DASH playback supports key system mapping.
https://shaka-player-demo.appspot.com/docs/api/tutorial-drm-config.html#choosing-a-key-system

player.configure({
  dash: {
    keySystemsByURI: {
      'urn:uuid:9a04f079-9840-4286-ab92-e65be0885f95': 'com.microsoft.playready.recommendation',
    }
  }
});

[avelad]

@wjywbs Are you interested in sending a PR for it?

[wjywbs]

I haven't checked how to fix this yet.