Add logging to the ongoing usage dialog.

When migrating the ongoing usage dialog from SysUI to
PermissionController, we removed the logging, as it did not work in
Mainline modules at the time.  That has been fixed, so let's add it
back.

Fixes: 123896378
Test: ./out/host/linux-x86/bin/statsd_testdrive -p
com.google.android.permissioncontroller 180.  Trigger all three paths
and see all three messages.

Change-Id: I2bef1576444a7481ac58b9276ad74a251624e321