- use $ANDROID_ROOT variable which in TWRP is set to /system_root on properly set up SAR devices and default set it to /system
- continue to correct any issues with /system and /system_root mountpoints but backup and restore any symlinks encountered
- only mount and umount /data when it is not mounted to begin with to fix MTP issues in TWRP on some devices (thanks @Zackptg5)
- refactor tear down into restore_env() function to allow restoring original recovery environment even after abort
- add lazy umounts because let's be thorough
- remove hacky workaround to avoid /system_root umount when booted since that should be handled by flashing app now
osm0sis
a88936cd00