Statsd MAX now obeys refractory periods too

The logic of where refractory period enforcement was moved out of the
anomaly tracker and into the metric's predictAnomalyTimestamp. It was
done for ORING, but not for MAX. This fixes MAX.

Bug: 74446029
Test: adb sync data && adb shell data/nativetest64/statsd_test/statsd_test
Change-Id: I51e43c7c132f424af8fe20a37f2ad10cc55b5989