Telephony: Fix call forward info logging.

Currently, QUERY_CALL_FORWARD_STATUS would use array to store call info
response, from BP side. So RILJ would just show the array hash code
instead of each field in the array, it would like this:
< QUERY_CALL_FORWARD_STATUS [Lcom.android.internal.telephony.CallForwardInfo;@41573f30]

This code change would parse the array field one-by-one, and show
each field in RILJ, like this:
< QUERY_CALL_FORWARD_STATUS { [not active reason:0 serviceClass:255 'null' 0seconds] }

This is very helpful for developer tracking call forward related issues.

Change-Id: I5485578c70f5344c75294d56583896a2d87d5d29