Add a new Config to map PIDF service-description to IMS Feature Tags

1) In order to support publishing carrier extenstions in the SIP PUBLISH
PIDF XML file, this change introduces a new carrier config that allows
a customizable mapping from service-description to IMS feature tag groups

2) Add better logging in dumpsys for SIP PUBLISH.

Bug: 180868933
Test: atest CtsTelephonyTestCases:ImsServiceTest
Change-Id: I69a7eed66591841df2c0bef043747b7fff3a48cf