## Description
This PR moves the native components (ffmpeg decoder, av1 decoder, &
`libmpv`) to https://github.com/damontecres/wholphin-extensions. They
can be retrieved as gradle dependencies now.
This allows for contributors to more easily include these extensions
when building Wholphin locally.
There are no user facing changes in this PR.
Note: the kotlin code for interfacing with `libmpv`, ie `MPVLib` &
`MpvPlayer`, is still in this repo for now.
### Related issues
Related to #828
### Testing
Emulator
## Screenshots
N/A
## AI or LLM usage
None
## Description
Adds the [`dav1d` decoder
module](https://github.com/androidx/media/tree/release/libraries/decoder_av1)
for ExoPlayer as an option. It can be enabled in advanced settings.
Performance will vary between devices.
### Related issues
Closes#103
### Dev notes
As with the ffmpeg module, this one is not required to build the entire
app so it's easier for developers to get started.
This also introduces a customized `DefaultRenderersFactory` for
ExoPlayer, but its largely copied from the super class's implementation.
Experimental MPV player backend
Related to #14, #22, & #85
You can switch to MPV in advanced settings and toggle using hardware
decoding or not.
This uses code and buildscripts from
https://github.com/mpv-android/mpv-android, plus other third party
libraries to build MPV
