tree 4f93d358f768d59299e8d37a1eb5b8ff74d29fb9
parent cba9c46108cc230c20ecdebfd7d48b597a4e3faf
author Yifan Hong <elsk@google.com> 1585938710 -0700
committer Yifan Hong <elsk@google.com> 1586369791 -0700

Allow to skip mounting metadata in recovery.

After factory data reset, metadata has no valid ext4 fs, and it is not
formatted when recovery is started. Hence, it is possible that recovery
can't mount metadata. Use fallback path for sideloading full OTAs on
Virtual A/B devices in this case.

Test: the following:
  fastboot reboot fastboot -w
  fastboot reboot recovery
  adb root
  adb shell mount -t ext4 /dev/block/by-name/metadata /metadata # fails
  adb reboot sideload
  adb sideload ota.zip # successful

Bug: 152352037

Change-Id: I51ae3e5918b0c00054f309832c45823d80e46c69
(cherry picked from commit 77141004ba643a1d6b9d8a663cfb0791c2fe6b92)
Merged-In: I51ae3e5918b0c00054f309832c45823d80e46c69