commit ac6a3a5e9d90edb533e5b377a4a14ef514be955a
author Christopher Tate <ctate@google.com> Tue Nov 18 11:57:25 2014 -0800
committer Christopher Tate <ctate@google.com> Thu Nov 20 12:48:25 2014 -0800
tree 5d03d18976e02f9f7ede07efab2bad3b074b005e
parent 2e982258f10e9af21ec328faf41e77b38b109738

Recents backup helper

Handles backup/restore of recent tasks for the system.  Currently the
thumbnails are not saved.

At restore time the historical task records are placed in a designated
separate location rather than directly in the live bookkeeping; this
avoids ID duplication issues and makes it easier to deal with lazy
adoption of the historical task state as apps are installed on the
device post-restore.

Bug 17303286
Bug 15986349

Change-Id: Ie156c1e2ab9c9a7e7ac0447b27016fdcef55dded