Processing of the received SIP code 999

When we send a request to PUBLISH and there is no change to the UCE capabilities, we
expected onCommandError() with COMMAND_CODE_NO_CHANGE.
But some of the vendor will instead send SIP code 999.
We need a patch to give to OEMs reporting this issue to consider SIP code 999 response
to PUBLISH in the same way that we handle COMMAND_CODE_NO_CHANGE.

Bug: b/215742337
Test: Pre-submit
Change-Id: I01cfbfcd65f68b884db4df79d1658bfe04f5becf