Access internal ringer mode to properly vibrate in DND

Currently, an incoming call will not vibrate properly in certain cases
in DND mode. Specifically, if Priority Only mode is set, but Calls from
anyone are allowed. We now get the internal ringer mode to detect if the
incoming call is ringing while in DND mode.

Bug: 29184073
Change-Id: I1e0e7cf384a2bc1df1378043cd3f7e9dec57a94c
1 file changed