AOSP v21

[OnePlus 6] Fix booting on A slot
[OnePlus 6] Fix userdata filesystem size
[OnePlus 6] Include a framework-res overlay (fixes auto backlight, improve battery-life, ...)
Fix status bar height for notches on various devices (Thanks @TadiT7)
[Samsung Galaxy S9 Qualcomm] Fix backlight
Fix webview in Android Go variant
Fix audio jack for some devices
Fix H264 encoding on Huawei (Thanks @OldDroid)
Fix backlight on some SDM845 devices (Xiaomi Mi Mix 2S, Xiaomi Mi8)