[automerger skipped] minadbd: Support `adb reboot` under sideload/rescue modes. am: 7b9b7db877 -s ours
am: f51f548c63 -s ours
am skip reason: change_id I84daf63e3360b7b4a0af5e055149a4f54e10ba90 with SHA1 10f441a9db is in history

Change-Id: Ia59936af2b0e8f33825b3e36ec2eb449fd4f7636