Split apexservice_test into separate ApexServiceTestCases cc_test

apexservice_test contains more integration-like tests that require
remounting system partition and pushing some test apexes into
system_ext, while all other files contain unit tests.

Splitting them into 2 separate cc_test modules should reduce flakiness
of the ApexTestCases.

Ideally we should avoid using remount in tests (since remount is an
unstable developer tool), but that requires a non-trivial amount of work
:(

Test: atest ApexTestCases
Test: atest ApexServiceTestCases
Change-Id: Ibe65cf8ed9d7cb05c168388be52116a617a8a339
7 files changed