Add the processing code that the device received the 504 response to the...

Add the processing code that the device received the 504 response to the PUBLISH request am: 3195dc70 am: 5bc043b0 am: 943fc668 am: 810012d5

Original change: https://android-review.googlesource.com/c/platform/frameworks/opt/net/ims/+/2048563



Change-Id: I3e8ed045eec0d6838833a6957fd65f7d6243d3a6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>