RebootEscrow: add bugreport dump

To make it a little easier to understand the current state
in a bugreport, log some of the internal state when a dump
is requested.

(cherry picked from commit cdd8467a)

Bug: 151512506
Test: adb shell dumpsys lock_settings
Merged-In: If6889737a5be452833f587db5400dc5fde27cd47
Change-Id: If6889737a5be452833f587db5400dc5fde27cd47