Rename BackupManagerMonitorUtil to BackupManagerMonitorEventSender and convert it into an instance class in preparation of
adding more complex behaviour for recording BMM events to dumpsys.

Bug: 290746120
Test: atest BackupManagerMonitorEventSenderTest, BackupManagerServiceTest,
TarBackupReaderTest, KeyValuBackupTaskTest, KeyValueBackupReporterTest
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:073d1f1e6abb73ea47a24e670f79e7a488e823ed)
Merged-In: Idba7eb5342038a86b34e73f63892a7a7d93bf894
Change-Id: Idba7eb5342038a86b34e73f63892a7a7d93bf894
13 files changed