[RTT] Update Wi-Fi RTT service name

Finalize Wi-Fi RTT service name per API review.

Note: CL 2 of 2 - removing old entry.

Bug: 65108607
Test: integration tests
Change-Id: Id2b3d91ea2ca578a5834a299275df188c68475da

private/service_contexts

@@ -129,7 +129,6 @@ radio.sms                                 u:object_r:radio_service:s0
 recovery                                  u:object_r:recovery_service:s0
 restrictions                              u:object_r:restrictions_service:s0
 rttmanager                                u:object_r:rttmanager_service:s0
-rttmanager2                               u:object_r:rttmanager_service:s0
 samplingprofiler                          u:object_r:samplingprofiler_service:s0
 scheduling_policy                         u:object_r:scheduling_policy_service:s0
 search                                    u:object_r:search_service:s0