CMFileManager : Allow rotation

Override onConfigurationChanged to help keep the state
intact and allow orientation change.

Patchset 2 : Override for other activities as well
Patchset 3 : Fixed scrollbars dialogs
Patchset 4 : Fixed landscape mode of picker activity
Patchset 5 : New landscape layout for NavigationActivity
Patchset 6 : Fix whitespace errors in copyright headers

Change-Id: Ibe52f0a0ebf0ea88d79dab1c8a06fb262d63ecb1