Move merge_status from bootloader_control_ab, which is in vendor space,
to a new generic AOSP struct in system space. This will allow more
devices to share the same HAL implementation.
This patch also changes libboot_control to compensate for merge_status
moving out of vendor space. The reference HAL library now also provides
separate helper functions for managing the merge status, so devices
using a custom boot control HAL can still take advantage of the new misc
implementation.
Bug: 139156011
Test: manual test
Change-Id: I5cd824e25f9d07aad1476301def5cdc3f506b029
This extracts the implementation of boot_control into a new library,
libboot_control. The bootctrl.default module now wraps this library.
This refactoring will allow us to re-use the same implementation in
HIDL.
Bug: 138861550
Test: mm bootctrl.default
Change-Id: Ic0558da3c2d8e6f5ebec63a497825c24b51623b7
