Add DevicePolicyManager constants for enterprise WiFi Provisioning with certificates

Adding extras to support connecting to WiFi with certificates from QR
code.

More is described in proposal doc: http://go/enterprise-wifi-proposal

Test: none
Bug: 111384818
Change-Id: I5acb31fbed4fb22bd610cf8a24ff0566f487107c
Fixes: 111384818
2 files changed