Implementing cross profile contnet sharing startegy for docsUI.

The new strategy is based on the user property that dictates whether
cross profile contnet sharing is to be delegated from parent or not.

Bug: 313471319
Test: DocumentsUIGoogleTests:com.android.documentsui.UserManagerStateTest
Change-Id: Id5deb79e3837c9571b82c1e6ff72cd134c832dfd
Merged-In: Id5deb79e3837c9571b82c1e6ff72cd134c832dfd