tree 77bd01dcdbf37d7726f20d14c2de7ac990ba1a4b
parent d3f3d8c6455b83511be09f2c225f3c6ad6310695
author Guang Zhu <guangzhu@google.com> 1558568783 -0700
committer Guang Zhu <guangzhu@google.com> 1558568913 -0700

add sideload mode and related APIs

- teach device monitor about sideload state
- add relevant reboot APIs to go into sideload mode
- also fixed an issue with adb reboot from recovery or
  sideload mode

Bug: 133343683
Test: added unit tests
Change-Id: I04fe2df7ac8f1a1fe419566c5715595317a5ba05