feat: provide option to disable usage of source elements in MSE

[srikieonline]

Some platforms may have some issues around load api. Provide apps to configure using load API or setting src to mediasource. Defaults to using load API.

[srikieonline]

'has an entry for every config option' tests are failing. From tracing the code, it looks like the config is created from default in player_configuration.js in createDefault API. And I've already added useLoad config in there. Any clue where else I should be looking at?

[avelad]

'has an entry for every config option' tests are failing. From tracing the code, it looks like the config is created from default in player_configuration.js in createDefault API. And I've already added useLoad config in there. Any clue where else I should be looking at?

You need add the new config here: https://github.com/shaka-project/shaka-player/blob/main/demo/config.js#L681

[shaka-bot]

Incremental code coverage: 80.00%

[srikieonline]

Looks like the test failures are not related to this change. Known issue?

[tykus160]

@srikieonline Firefox failing test around cross boundary is a known issue.

[matvp91]

@srikieonline, for reference, which devices are we talking about? There's device detection that adds specific defaults to the config for a set of devices.