Replace deprecated string resources.

alert_yes/no were deprecated in 4.4, and discontinued in 4.4.3.
Replace them with the system's "yes/no"

Change-Id: Ia0b2a68ffb7098c3c4ba70856e831a61161e2886
Merge branch 'kitkat' of github.com:AOKP/packages_apps_InCallUI into kitkat