Enable SVDO. (2/2)

Allow evdo/ehrpd + voice simutaneously.
Use ro.ril.svdo=true

Change-Id: Ifcefd1ee49c5137209b776b00ae8e189dc618247
(cherry picked from commit 3e835c216588ae44a7099113f95118e9a3a23c15)

Change-Id: If7be25edc10f21680adbe3a059370d77a82ef076