Apexd: Implement shellCommand

Add ability to connect to apexservice via cmd. Will ease development
and possibly testing.

Test: mmma system/apex/apexd
Test: adb push system/apex/apexd/testdata/test.apex /data/local/tmp && adb shell 'setenforce 0 ; cmd apexservice installPackage /data/local/tmp/test.apex'
Change-Id: I5b267f61d693c1a1a844dd80a3d96f8a534bf95c
2 files changed
tree: a9e5a49e34213252095d279477eab53aca5a8f98
  1. apexd/
  2. apexer/
  3. testdata/
  4. Android.bp
  5. OWNERS
  6. PREUPLOAD.cfg