Persist dex use information.

After this change, dex use information can be saved in a proto.

Also, this CL enables Proguard in order to reduce the cost of
introducing protobuf.

Bug: 249984283
Test: atest ArtServiceTests
Ignore-AOSP-First: ART Services.
Change-Id: Ifae646e12241364d5edb3cc5ecd4c8548539b9c4
8 files changed