Log accessibility privacy warning status (1/2)

Uses the atom NonA11yToolServiceWarningReported in westworld to log
the accessibility privacy warning notification is notified or clikced
in accessibility framework.

Bug: 180983963
Test: m statsd_testdrive && statsd_testdrive 384
Change-Id: I73129e17a62084811f5eb59a2805a38ffb0f112b