tree dce377e9c9730053733053fb8494f816e2f29945
parent d625d28ec6cf22c128d0ef0b8e64a9fff4b64aec
author Andrew Lee <anwlee@google.com> 1445876776 -0700
committer Andrew Lee <anwlee@google.com> 1445881785 -0700

Allow voicemail numbers to be blocked.

Though it is lighter on logic now, it still seems helpful to have
a common helper to return whether it should be possible to proceed
with blocking a number.

Bug: 25230222
Change-Id: I99f93f1cfc09988b3dec77f71541463c96d06225