Revert "Implement DocumentsProvider.createDocument and deleteDocument"

The original commit breaks the public API and causes crashes when
deleting certain items in DocumentsUI

This reverts commit f6bfaee6ad7ccd4491609d5df606558a4ae30f72.

Change-Id: I5a433148548e7a1a997ee50e5938f7a4cb4c5ade
SettingConfirmationHelper: Unbreak public api

Missing @hide for javadoc breaks public api.

Change-Id: I29c5e8b5b2ae5a998fdf84895808f79d1e7ae500
Signed-off-by: Evan Anderson <evan@thelinuxman.us>