Check for hardware video format decoding support and use WebM if supported by default

Checklist

• I made sure that there are no existing issues - open or closed - which I could contribute my information to.
• I have read the FAQ and my problem isn't listed.
• I'm aware that this is a request for NewPipe itself and that requests for adding a new service need to be made at NewPipeExtractor.
• I have taken the time to fill in all the required details. I understand that the feature request will be dismissed otherwise.
• This issue contains only one feature request.
• I have read and understood the contribution guidelines.

Feature description

NewPipe should check if the device has hardware decoding support for it on first start and set it as default if it does.

Why do you want this feature?

WebM seems to be the better codec in most situations.

Additional information

No response