Add Category and Categorizer classes.

The Category is used to put UPTCs in different groups. Categorizer
returns the correct group for each UPTC.

Bug: 135764360
Test: atest CountQuotaTrackerTest
Test: atest DurationQuotaTrackerTest
Change-Id: Iab00c5b67d5b2f3a68b53e3c4d8166fe649e0f7b
2 files changed