Telephony: Enable Speaker on Proximity (2/3)

restoring abandoned commit from:
    https://gerrit.slimroms.net/#/c/15837/
===
PS2: added italian translation
PS3: remove preference for problematic devices
PS4: remove it translation
Change-Id: I081c9513c346ad00d973bf5d926eca2b2f4eeb6c

Conflicts:
	res/values/cm_strings.xml
	res/xml/call_feature_setting.xml