Support CENC ClearKey

[yqritc]

Hi, I'm trying to figure out how to play dash content using clearkey.
It seems mediadrm in Android Framework support clearkey.
https://android.googlesource.com/platform/frameworks/av/+/master/drm/mediadrm/plugins/clearkey

I've found widvine and plyaready samples in demo application, but I couldn't find clearykey one.
ExoPlayer does not support clearkey?
If not, any plan to support in the future?

thanks

[yqritc]

The implementation of clear key seems to be merged!! thanks!!