Apexd: Add gtests as presubmit

Mark the tests as device-tests and give apex_file_test a test
configuration, then add the tests as presubmit.

Test: mmma system/apex/apexd
Test: pushd system/apex/apexd && atest && popd
Change-Id: I0339de5bfe5c47f45700b6256487e3a215e59462
5 files changed
tree: 1fcb01f1fe5a633532a883c7ed292e93d7c83699
  1. apexd/
  2. apexer/
  3. testdata/
  4. Android.bp
  5. OWNERS
  6. PREUPLOAD.cfg