Notes: 

• Everything seems to be working.

• OTA is available using the ArrowOS recovery

• The device will receive weekly official releases

• BE CAREFUL AND ALWAYS BACKUP YOUR DATA. Dirty flash from A13 to A13.1 was not tested. I recommend to clean flash.

Credits:

• @Ariank16a for device trees and help.

• @daniml3 for help

android_tools_extract-utils: extract_utils: fix generating system/bin & system/etc blueprint

android_tools_extract-utils: extract-utils: egrep: warning: egrep is obsolescent; using grep -E

android_tools_extract-utils: extract_utils: extract recovery and vendor_ramdisk

android_tools_extract-utils: extract-utils: Fix for `sh_binary`

android_tools_extract-utils: extract_utils: Sync adb pull paths with local extract

android_tools_extract-utils: Stop using TMPDIR

android_tools_extract-utils: extract_utils: Stop treating subdirs as special during sort

android_tools_extract-utils: extract-utils: Allow overriding VENDOR with VENDOR_COMMON

android_tools_extract-utils: Support extracting from sparsechunk super images

android_packages_apps_Settings: Settings: Show battery saver refresh rate toggle with smooth display as well

android_packages_apps_Updater: Updater: Correct the changelog URL