Jeff Sharkey 47f7108c12 Prepare user storage just before using it.
Wire up preparing of user-specific app storage to existing user
lifecycle hooks.  This way we're sure the storage is ready to roll
just before we start reconciling app data directories.

This also has the nice property that we only prepare storage when
we know that keys are unlocked.

Bug: 25796509
Change-Id: Ic7df9ddbcfb1e20649d11b6cf68d424e3c365ee1
2016-02-05 11:00:31 -07:00
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