amc: Add MLSDK implementation
Magic Leap media stack is based on Android, but without Java/JNI. Instead its SDK exposes a C API 1:1 identical to Android's MediaCodec.
- The SDK can be downloaded from https://creator.magicleap.com/downloads/lumin-sdk/overview.
- A demo app with build script: https://gitlab.freedesktop.org/xclaesse/gstreamer_demo/
- Mozilla's Servo is using this: https://twitter.com/asajeffrey/status/1162024431365042177
Is GStreamer upstream interested in merging Magic Leap support? If so, I guess one requirement would be to get CI in place? Unfortunately the SDK is only available for MacOSX and Windows, it shouldn't be too hard to get it installed in Windows Docker image. I can work on that if needed.
Note: It also need a new audio sink element, I'll submit it as a follow-up MR.