PhoneProxy: Restore previous updatePhoneObject logic.

	No reason to do an opt-in with a boolean, most cdma devices with >= v6 RIL should be
	able to update their IccCardProxy when triggered by an EVENT_ICC_CHANGED
	message.

Change-Id: Ica92c2d53e9d3551d3abe8b460b80d0d381ac5bb