Telephony: Enable Speaker on Proximity (2/3)

PS2: added italian translation

Change-Id: I6e33ce31ec081f529fcc29387afdf46bddaa7d39

Conflicts:
	res/values-it/slim_strings.xml
	res/values/slim_strings.xml
	res/xml/call_feature_setting.xml
	src/com/android/phone/CallFeaturesSetting.java