Resume-on-Reboot: add logs to aid in debugging

There are some failures during CTS tests which fail to arm the
RebootEscrow HAL, but the reason is unclear due to lack of logging
during error cases. This adds the missing error logging for cases that
shouldn't happen.

It also adds logs for success cases that should only happen once per
boot: escrow key restoration per user and escrow key arming per boot.

Test: atest CtsAppSecurityHostTestCases:android.appsecurity.cts.ResumeOnRebootHostTests
Change-Id: Ia2d015dda3eae3b1bbba2d898a485cd2b174ad1a