Fixed crash in calls Statistics Tab.
https://jira.cyanogenmod.org/browse/CYAN-3503

Removed unnecessary cast that caused the crash.

Change-Id: Ib4f273ba3838cf6db8803ded5c7df19003b0ef12
Merge branch 'cm-11.0' of https://github.com/CyanogenMod/android_packages_apps_Dialer into cm-11.0