ee7b7ffba4
We are now requiring fstab v2 for android-10+ trees. You can specify twrp flags using /etc/twrp.flags to label and annotate partitions. This patchset uses fs_mgr to load the super partition and build device mapper blocks off vendor and system depending on the slot in use. These are mapped to partitions in TWRP and allowed to be mounted read-only. The super partition is also mapped into a TWRP partition in order to backup the entire partition. You cannot backup individual device mapper blocks due to the device can only be read-only. Therefore you cannot write back to the device mapper. Change-Id: Icc1d895dcf96ad5ba03989c9bf759419d83673a3