[RTT] Update Wi-Fi RTT service name

Finalize Wi-Fi RTT service name per API review.

Note: CL 1 of 2 - adding new entry here, will remove
old entry in next CL.

Bug: 65108607
Test: integration tests
Change-Id: I065ce9d570510180fa8c8f09e1025ac795706405

private/service_contexts

@@ -178,5 +178,6 @@ wifiscanner                               u:object_r:wifiscanner_service:s0
 wifi                                      u:object_r:wifi_service:s0
 wificond                                  u:object_r:wificond_service:s0
 wifiaware                                 u:object_r:wifiaware_service:s0
+wifirtt                                   u:object_r:rttmanager_service:s0
 window                                    u:object_r:window_service:s0
 *                                         u:object_r:default_android_service:s0