Optimize DraggableController, and fixed bug

remove brvahKtx

remove brvahKtx

Update README-cn.md

Merge pull request CymChad#2831 from AllenCoder/androidx

update Androidx

Merge pull request CymChad#2815 from AllenCoder/androidx

Merge remote-tracking branch 'remotes/remote/master' into androidx

Merge remote-tracking branch 'origin/master'

Merge pull request CymChad#2628 from CymChad/revert-2626-androidx

Revert "merge new feature to Androidx "

Merge remote-tracking branch 'remote/androidx' into androidx

Merge pull request CymChad#2625 from AllenCoder/master

 rm unused resource