Call detect anomaly in period job only when there is new battery usage data.

 - Reduce the memory usage of call anomaly detection
 - Remove redundant condition for low battery banner

Bug: 300446490
Bug: 284893240
Fix: 300446490
Test: presubmit
Change-Id: I11c1b41a45e129bcec57b9d18c4affe0de7f1d38
Merged-In: I11c1b41a45e129bcec57b9d18c4affe0de7f1d38