Reduce frequency of LongArrayMultistateCounter.incrementValues calls

This is an optimization that skips incrementing a multi-state counter
with an array of zeros. Adding a zero does not take much time,
but locking the java array in the JNI layer is expensive.

Bug: 395954049
Test: atest PowerStatsTests; atest PowerStatsTests:BatteryUsageStatsProviderPerfTest#getBatteryUsageStats_accumulated
Flag: EXEMPT bugfix
Change-Id: I5310a08bf8a56818ee3361097842f763f3c026ac