Reorganize and add more dumps within opt/telephony.

In particular dump is added to PhoneProxy which dumps
PhoneSubInfoProxy which dumps PhoneSubInfo this should
provide the desired information.

Also add some additional pw.flush() statements to
minimize the buffer overflows and truncate the output.

Bug: 17545077
Change-Id: I39787a84c97a8fc0410419965f6be2468dec7568