Log SecurityLevel with RkpErrorStats.

Bug: 230750270
Test: Local testing with statsd TestDrive script
Ignore-AOSP-First: This targets T and will be cherry-picked to AOSP later.
Change-Id: I8490e31df4a111ff6787ea67dd8a170b410566df
(cherry picked from commit d675e225a798b2e2388a8bd2f93c61caaa87e295)
4 files changed