Add the processing code that the device received the 504 response to the PUBLISH request

As per AT&T requirements, if a device receives a 504 response to a PUBLISH request, it is treated like a received 403 response.
However, the current AOSP framework is missing for this.

Bug: b/225094509
Test: atest CtsTelephonyTestCases:ImsServiceTest

Change-Id: I43665589e735023de9c8d3d3138e23d094910c19
Merged-In: I43665589e735023de9c8d3d3138e23d094910c19