Selecting Phone Contact for Voicemail number

When onResume is called in VoicemailSettingsActivity, preference is
removed. This causes the mismatch with the previous and current preference.
Due to the mismatch in preferene voicemail number is not saved.

Test: manual - voicemail functionality
Bug: 34920178
Merged-In: I5d16559243dab08e5c4a7b29bbb1c90685a55cec
Change-Id: I5d16559243dab08e5c4a7b29bbb1c90685a55cec
1 file changed