AOSP 10.0 v200.d

Ok, this release should be bootable for most people, you can now start reporting broken hardware features.

Gapps are still out of scope, please don't report issues related to them.

Fixes mediacodec for some people
Support Asus Zenfone 6's "front" camera
Fix boot on A/B (previous release 200.c required the removal of system/etc/init/apex-setup.rc)
Navigation bar is still not back by default. Do setprop persist.sys.phh.mainkeys 0 to enable it.