Allow protected or sticky broadcsts without flags.

Protected broadcasts don't need to be marked as exported or not exported
since they can only be sent by the system. We're also not enforcing the
flag change for sticky broadcasts since they're just asking for the most
recent value.

Test: just changing it back to what it was
Bug: 161145287
Change-Id: I0cffe51ae8ae319032c3fb54fa73f9abca5948f4