Add support for prebuilts

Prebuilt can be added to APEX via prebuilt_modules. The prebuilt modules
are defined using the prebuilt_etc module type.

The prebuilt files are installed under /etc directory of an APEX.

Bug: 112672359
Test: m apex.test the resulting APEX has sample_prebuilt_file under /etc
dir.

Change-Id: I00e6295ab11389249d0632c53644ca03a3c7f465
3 files changed
tree: d440e12bb6b784d983493ffabe3abddafefff1df
  1. apexd/
  2. apexer/
  3. build/
  4. OWNERS
  5. PREUPLOAD.cfg