Check installed and enabled state for package domain approval

If the package isn't installed or isn't enabled for a user, it cannot
be approved for that user.

Also hooks into package uninstall for a single user to remove the
domain state for that package for that user.

Bug: 183226822

Test: atest DomainVerificationManagerApiTest#getOwnersForDomain
Test: atest com.android.server.pm.test.verify.domain

Change-Id: I04942e1491d470fdd41e99f207bbf85baae87d4c