Update consent manager v2 with R to T+ data migration logic.

Syncing AdExtDataConsentMigrationUtilsV2 with
AdExtDataConsentMigrationUtils. The logic is similar except the v2
utils class uses storage manager appropriate for consent manager v2
work. Also introduced tests for v2 methods and minor updates to use
@SpyStatic in the non v2 test class.

Bug: 324273438
Test: atest com.android.adservices.service.consent

Change-Id: If14fd0f813fe1e0978b3aaeb942101149109d242
5 files changed