Implement an object whose job it is to keep track of changes in uid_io stats over time.

This object will periodically ingest new uid_io records, and generate running totals over time, as well
as generate a delta between the previous state of the system and the new records.

Bug: 65846699
Bug: 32512551
Test: TARGET_USES_CAR_FUTURE_FEATURES=true bit CarServiceUnitTest:*

Change-Id: Ia0169714b1882ec8931941a9334141b6ab2cb97c
6 files changed