Move StagePackages tests from apexservice_test to apexd_test

apexservice_test require test apexes to be pre-installed on the device,
and only way to cleanup is brutally deleting directories under
/data/apex, which might impact other tests. So, instead we are moving
tests to apexd_test which should be more hermetic.

Test: atest ApexTestCase
Change-Id: Ieebf5b2eb8fc5fca015d617d0a8a6aad3db21f69
2 files changed