Prepare for better device categorization by moving everything to testing
subdir first.
[skip-ci]: chicken-egg problem: passing pmaports CI depends on pmbootstrap MR
depends on this MR
Related: postmarketos#16
Lots of device-specific configurations:
* android mount points and mounts
* android groups and users (needed for udev rules)
* android udev rules for platform devices (needed for android services to run)
* NetworkManager device-specific config
* wpa_supplicant device-specific config
* device-specific openrc service for late initcalls to bring up Wi-Fi hardware
* extra helper scripts to call logcat, set backlight brightness,
get battery status, unlock kde screenlocker session
* use kernel cmdline from downstream android to keep it as close to
android as possible. Important for android in lxc container later
