tree b0e3acf9305aec92ab4f388b6948caeccb05a8f7
parent 7b9b7db877f082a9adaa8b8a8572940cb5720a11
author Tao Bao <tbao@google.com> 1556045185 -0700
committer Tao Bao <tbao@google.com> 1556478856 -0700

Parse BCB command to enter rescue mode.

bootloader will set `boot-rescue` in BCB command field to indicate
booting into rescue mode. This CL adds the matching parsing code.

This CL changes the on-screen UI to display the default image while
waiting for each sideload / rescue command.

It also changes the minadbd reboot handlers to use REBOOT_ instead of
the previous ENTER_ actions. This ensures a reboot going through
bootloader, which may load a newly installed bootloader/recovery.

Bug: 128505466
Bug: 128415917
Test: Boot into rescue mode. Run `adb rescue getprop` and `adb rescue
      install`. Check the UI. Then run `adb reboot rescue`.
Change-Id: I5b7de9dfd898ed8e14bea0d4ad7385a9bae26e94
Merged-In: I5b7de9dfd898ed8e14bea0d4ad7385a9bae26e94
(cherry picked from commit d9cb014d431fee946308bdb8979c8e8fa74b582f)