RRO: reintroduce lost ResTable insert of assets

With the recent introduction of AssetManager::appendPathToResTable,
overlay packages were not properly added to the AssetManager, and once
added, were not properly inserted into the ResTable.

Bug: 17765434
Change-Id: Ie21f227c654c98730f74a687d0e16ee2b80e747e
RRO idmap: pad with 0xffffffff, not 0x00000000

In the new idmap format (version 0x1), 0x00000000 no longer represents a
non-existing entry: 0xffffffff should be used instead.

Bug: 17765434
Change-Id: If2c7e09feba2224eeafe88fd9230e6392d81b9a7
Fix bug in passing of context flags and version.

Change-Id: Id20906f6f47b573d881025453a3b6356bcf6e9c7
Merge changes If2c7e09f,Ie21f227c

* changes:
  RRO idmap: pad with 0xffffffff, not 0x00000000
  RRO: reintroduce lost ResTable insert of assets
Merge "Fix bug in passing of context flags and version."