Phone: transparent in call widget (optional) - SlimBean

To see the complete contact picture on incomming calls
a lot prefer to have a transparent background. This commit
introduces this feature as optional option.

As well a bit sorting of the phone settings screen

cheers

Change-Id: I0ed0ec3b3ec819b66edd412f8f24b04b51cde37f

Conflicts:
	res/values/strings.xml
	res/xml/call_feature_setting.xml
	src/com/android/phone/PhoneUtils.java