Telecomm: Add a null check to custom ring vibration

When the custom option is selected for the first time the value for it
is null for a split second before the default value gets applied, which
causes an NPE that kills system server: https://del.dog/peckinepit.log

Signed-off-by: Joey Huab <joey@evolution-x.org>
Signed-off-by: Ayan Mukherjee <mukherjeeayan725@gmail.com>
1 file changed