tree 7e0d268233fc6bea07a361cf6913fc3a5e524063
parent dd874b1c87eb04f28db0db2629df0adde568a74c
author Tianjie Xu <xunchang@google.com> 1462042199 -0700
committer Tianjie Xu <xunchang@google.com> 1463777813 -0700

Allow recovery to return error codes

Write error code, cause code, and retry count into last_install. So we
can have more information about the reason of a failed OTA.

Example of new last_install:
@/cache/recovery/block.map     package name
0                              install result
retry: 1                       retry count (new)
error: 30                      error code (new)
cause: 12                      error cause (new)

Details in:
go/android-ota-errorcode

Bug: 28471955
Change-Id: I00e7153c821e7355c1be81a86c7f228108f3dc37