Remember instance state across configuration changes, and enable
rotation. This remembers current modes and in-progress traversals.
Always finish action modes after launching an action. Fix sharing
by always putting Uris in extras, and always wrap in a chooser. Find
common MIME types when sharing multiple documents. Fix downloads
launching by following directory MIME type change.
Introduce "Durable" which is like Parcelable, but can be used for
both byte[] storage and Parcel transport. Make both DocumentInfo
and DocumentStack durable.
Disable recents until new behavior is implemented.
Bug: 10460236, 10446265, 10533674, 10456344, 10456702
Change-Id: I4eaf2b0b4cde611c69a1e7b5f1586f6b02019b27
b51331116e