tree 2eb12fdfc95a0f3bd4a8efec0102364fb3b4cbf5
parent 5f3982056d7ea7695faf94d592d60b73dbc7f992
author Tao Bao <tbao@google.com> 1476399847 -0700
committer Tao Bao <tbao@google.com> 1476404236 -0700

Fix the prefix matching for uncrypt status.

Also change its logging statement from PLOG to LOG, since
android::base::StartsWith() doesn't set errno.

Test: Build and reboot into recovery image. Check last_log.

Change-Id: I55ac7eec24228db76a13580958b4a4330b06cf57
(cherry picked from commit ee9b95544a7af548e98f2b7a080e2eb7abaaf981)