Add support for APEX packages in system partition to apexd.

In addition to scanning and loading APEX packages from /data/apex,
also do so from /system/apex, in that order -- so that packages in the
former location can override packages from the latter location.

Test: Build product containing ART minimal APEX module (see
      https://android-review.googlesource.com/774928) in
      /system/apex, flash and boot device with it, and check that
      the ART APEX module is mounted correctly.
Bug: 112455435
Bug: 113373927
Change-Id: I354c2ecf1f45b028909ace93728ddf59619b1ab4
1 file changed
tree: dde33ae21b166c9591b76373a40b6de00ab391ef
  1. apexd/
  2. apexer/
  3. build/
  4. OWNERS
  5. PREUPLOAD.cfg