Get rid of IApexService.stagePackage binder API

* IApexService.stagePackages API provides same functionality.
* Less binder APIs to maintain.
* Will make my work of renaming package to module a tad easier.
  (see attached bugs)

Bug: 136078302
Bug: 132428457
Test: atest apexservice_test
Change-Id: Ibfbbc760d9903d0d81b62e6229b5ce6d6cc40156
3 files changed
tree: 33ac501b22b93a858c9c108f319e37b7b255ad7e
  1. apexd/
  2. apexer/
  3. docs/
  4. proto/
  5. shim/
  6. tests/
  7. CleanSpec.mk
  8. OWNERS
  9. PREUPLOAD.cfg