newfiles: hide 'usage rights' features unless flag is on

closes: CNVS-17256

this hides all 'usage rights' feature from newfiles
except for accounts that have the 'usage_rights_required'
feature turned on.

specifically, the (C) icon in the column header,
the 'manage usage rights' cog menu option
and the (c) button in the toolbar.

any files that have a copyright set on them should
still have a little (c) icon.

Change-Id: I38ab2ae46fa84a82743f250c5a0e0cd9ab3f409b
Reviewed-on: https://gerrit.instructure.com/45307
Reviewed-by: Clay Diffrient <cdiffrient@instructure.com>
Product-Review: Cosme Salazar <cosme@instructure.com>
Tested-by: Jenkins <jenkins@instructure.com>
QA-Review: Jahnavi Yetukuri <jyetukuri@instructure.com>