Android Linux has long stopped being just a fork, plenty of features would never land on upstream.<p><a href="https://source.android.com/devices/architecture/modular-system" rel="nofollow">https://source.android.com/devices/architecture/modular-syst...</a><p><a href="https://source.android.com/devices/architecture/hal" rel="nofollow">https://source.android.com/devices/architecture/hal</a><p><a href="https://source.android.com/devices/architecture/configstore" rel="nofollow">https://source.android.com/devices/architecture/configstore</a>