Bug 852515 - [Dialer] Inclusion of 'withheld number' instead of 'unknown number' (follow-up of 850170).
Merge pull request #8729 from gtorodelvalle/dialer-bug-852515-withheld-number-text

Bug 852515 - [Dialer] Inclusion of 'withheld number' instead of 'unknown number' (follow-up of 850170) (r=fcampo)