Add BMM events to V to U restore

Add logs so that we can record the V to U scenario in the backup
dumpsys and in clearcut
We only print the allowlist/denylist once in the backup dumpsys (at the beginning of system restore)

Test: manual (check that the VtoU events appear in the dumpsys - See for an example: https://paste.googleplex.com/4697312460275712#), atest PerformUnifiedRestoreTaskTest, atest BackupManagerMonitorUtilsTest
Bug: 324233962
Change-Id: I07c483b80093037e36076bc174ef6d9484f01d65