Remove unused code in CallNotifier.

All of these in-call tones are handled in the Telecom equivalent, with
the one exception of the voice privacy tone.
Removing support for the rest of the tones to prevent them from being
picked up again in the Telephony stack.

Test: Compile the code; verify dead code paths are really dead.
Bug: 201075753
Change-Id: I92dbf029833e3cc1cd733f5d354ab9901f1fb95f
1 file changed