apexd: store active apex files in /data/apex/active

- stagePackages checks that /data/apex/active is created, and creates it
  in case it is not.
- moved createDirIfNeeded from apex_session to apex_utils.

Bug: 122339211
Test: apexservice_test apex_file_test apex_e2e_tests
Change-Id: I146def94ff1e653f6bd68c06a30178ef115cbf55
7 files changed
tree: cc06c4389ef023f6db5637ac3c885450744e9ed0
  1. apexd/
  2. apexer/
  3. proto/
  4. tests/
  5. OWNERS
  6. PREUPLOAD.cfg
  7. TEST_MAPPING