Create APEX target for stress testing build features

Existing APEX module used in testing is too simple and does not use all
the build features available to it.

Test: atest apex_e2e_tests
Bug: 123290268
Change-Id: Iec26cf96f43a7453486c92c1f721c7aed9b295ef
1 file changed
tree: 24e2fc2e664d6fefaf068928b061af0b3e6d637f
  1. apexd/
  2. apexer/
  3. proto/
  4. tests/
  5. OWNERS
  6. PREUPLOAD.cfg
  7. TEST_MAPPING