Cleanup flag for notification memory dumps in bug reports

This cleans up the released flag which adds notification memory use to
bug dump reports. This flag has been released since QPR2 and no bugs were found within the code.

(statsd logging is still flag protected with a different flag)

Bug: 254512425
Change-Id: Ie2048f3d74f38dd689663f1641410932cfe7d92d
Test: Unit tests