Use FrameworkStatsLog in QSSecurityFooter

As part of statsd becoming a Mainline module in R, autogenerated
StatsLog.write() calls are going away and replaced by *StatsLog.java
that is autogenerated for each module.
This CL replaces some usages of StatsLog with FrameworkStatsLog.

Bug: 145952197
Test: m
Change-Id: I4a622616aa603fe88d0ecca997c8fe93cfae7abc