Simplify and generalize array handling in SqlUsageTracker

Change-Id: I6facbbd6efb8190b885059caadcabf64b748d95f
Fix wfLogWarning call and interface documentation

Change-Id: I087921536907757d35d181e7a326600446b55a62
Merge "Simplify and generalize array handling in SqlUsageTracker"
Merge "Fix wfLogWarning call and interface documentation"