bootstat: Two changes to aid in debugging TimeSinceFactoryReset.

* Also log to the BootEventRecordStore to check lossiness.
* Log factory_reset_current_time_failure separately.

Bug: 27550578
Change-Id: Id3d579a74a59ac28290cb7d6048765519f9ba59b
(cherry picked from commit fff95ba5dd9da74afe6897db1726c0b5f70e8930)
1 file changed