DO disclosures referring to actions that the admin did not actually
take are hidden in the UI, but still show up in the search index. This
CL switches the remaining PreferenceControllers from setting visibility
to implementing isAvailable() instead.
Bug: 32692748
Test: m RunSettingsRoboTests
Change-Id: I54360698f28b549b18cdc230e3b9087cf4e9ff4a
It was decided that rather than having two separate items for CA certs
in the personal and work spaces, we should have just one item that
lists the sum of installed certs.
Bug: 32692748
Test: m RunSettingsRoboTests
Change-Id: Ic8a3db214a07992e3970262c2ce91f3df8a87773