Increase BMM logging coverage for restore at install flow

This change adds BMM logging in restore at install flow right from the point when PackageManager triggers restore.
The change also adds more detailed logging in Full Restore flow, around various failure points. This'll help with quantify different failures that happen in Full Restore flow, some of which are masked by the complexity in Framework code.

Bug: 331749778
Test: Ensure that the change builds (m -j frameworks/base)
	Ensure CTS and GTS B&R tests pass
Change-Id: Ieff6df433398ffff71c7eeda73174f9f1d509b58
diff --git a/services/backup/flags.aconfig b/services/backup/flags.aconfig
index e9f959f..74adfe0 100644
--- a/services/backup/flags.aconfig
+++ b/services/backup/flags.aconfig
@@ -50,4 +50,12 @@
             "logger."
     bug: "296844513"
     is_fixed_read_only: true
+}
+
+flag {
+    name: "enable_increased_bmm_logging_for_restore_at_install"
+    namespace: "onboarding"
+    description: "Increase BMM logging coverage in restore at install flow."
+    bug: "331749778"
+    is_fixed_read_only: true
 }
\ No newline at end of file