Fix the subscribe request with the result sip code "404" doesn't map to...

Fix the subscribe request with the result sip code "404" doesn't map to RcsContactUceCapability with request result = REQUEST_RESULT_NOT_FOUND

1) Map the sip code 404 not found to the RcsContactUceCapability with request result REQUEST_RESULT_NOT_FOUND

2) Remove the CapabilityRequestResponse#copy because all the request are run in the looper and the CapabilityRequestResponse is protected by the synchronized

Bug: 181266556
Test: atest -c CtsTelephonyTestCases:android.telephony.ims.cts.RcsUceAdapterTest
Change-Id: Iabe76e17885f75355db427b965fe53047a1c4a56