Statsd value metric anomaly detection

Add anomly detection to Value metric in statsd.

Test: make statsd_test && adb sync data && adb shell data/nativetest64/statsd_test/statsd_test
Test: run cts-dev -m CtsStatsdHostTestCases -t android.cts.statsd.HostAtomTests#testValueAnomalyDetection
Fixes: 70240042
Change-Id: I05cf36495cdfd0ac7aa1a922f0e253a60fda1787
3 files changed