set Android TXLiteAVSDK_Player_Premium to 12.2.0.15065，tag：release_premium_v12.2.0
set iOS TXLiteAVSDK_Player_Premium to 12.2.16945， tag：release_premium_v12.2.0
Pre-download supports httpHeader
Supports encrypted playback of MP4
Added support for HEVC playback downgrade
Fix other known issues.