Apexd: Add StatusOr

Add a simple implementation of a data-or-error variant. Move ApexFile
and ApexManifest over.

Test: mmma system/apex/apexd
Test: pushd system/apex/apexd ; atest ; popd
Change-Id: I5e4cc4899286382cdc1d621692f2011d7f484abb
10 files changed
tree: 1e9d778a454064b081d10c49b3adf613a836851d
  1. apexd/
  2. apexer/
  3. testdata/
  4. Android.bp
  5. OWNERS
  6. PREUPLOAD.cfg