I've created magisk module which enables camera api2 and contins camera permissions files from aosp
magisk module camera api mi6
drive. google. com/open?id=13y67sdImtCMl24pPukviN1n7JGOoyUKQ (can't post with url yet :( )
It allows using hdr+ with *no-support-for-this-app-on-this-forum* & autofocus (bsg_test3)...