tree 92e8761e1415e13d789199be3d0b60a873f2763e
parent 92d7e697a864a3e18bef4ef256bb3eb339a66b4e
author Jeff Sharkey <jsharkey@android.com> 1375484126 -0700
committer Jeff Sharkey <jsharkey@android.com> 1375490378 -0700

Track and persist directory stacks; recents work.

Move to manual tracking of directory navigation stack so we have Uri
data to persist, instead of opaque fragment backstack.  Remember
directory stacks across launches on a per-app basis.

Start recording recently opened and created files.  Uniform Uri
parameter extraction utility methods in contract.

Change-Id: I79ed30ee10272bf7c53d339e797639c993f649bb