Move static UsageStatsManager from DatabaseUtils to DataProcessor to

avoid reference from DataProcessor.

This is to fix the Accessibility tests hang issue.
Tested on main branch (https://android-build.googleplex.com/builds/abtd/run/L40400000962473343).

Test: make RunSettingsRoboTests
Bug: 293366011
Bug: 295026588
Bug: 295123907
Change-Id: I345e0c060165e4d06f98ada6b2e1ca3cbb4f911a