Treat hev2/hvc2 as a valid HEVC base for Dolby Vision Profile 20#2946

ybai001 wants to merge 3 commits intoandroidx:mainandroidx/media:mainfrom

DolbyLaboratories:dlb/dv-p20-mime/devDolbyLaboratories/media:dlb/dv-p20-mime/devCopy head branch name to clipboard