Android M109 size compaing to M108

[Yurii Kyrylchuk]

Hello, recently I've built a new stable revision of WebRTC M109 for Android and noticed a significant size change (+ ~4Mb), which was not expected according to a release notes. Comparison with previous M108 build shows, that the main difference is in dav1d module, which took several kB in M108 and now it's ~4Mb in M109.

Could someone explain, what happened around that, and what is the relation between libaom and dav1d, as I see both of them right now, but I thought, we should have only one of them for AV1 support.

Thanks in advance.