Disable a phone number log for user build

A phone number is privacy data. Therefore, it should be prevented
from logging in user build.

Co-Author: xuegang.x.liu <xuegang.x.liu@sonymobile.com>
Co-Author: kei.x.ueda <kei.x.ueda@sonymobile.com>

Test: manual - checked log
Bug: 34582911
Change-Id: Ia1d33d43cf69de8b429ea243d988e275d81f1062