Move Android partition mounting to rootfs, support Android 9
This MR:
- Moves Android partition mounting & overlay logic from halium-boot to this package.
- Make the logic support new tricks used in Android 9+.
- Support showing charger UI from inside Android container.
With this, both Sony Xperia X & Volla Phone (with a patch [1]) boot to both normal boot and charger.
Fixes #28 (closed), #29 (closed).
[1] https://github.com/HelloVolla/android_device_volla_yggdrasil/pull/13
Edited by Ratchanan Srirattanamet