Put correct user/group in EVS mock driver .rc file

If this module is included on a target platform, it will start at boot
time (but not very early) since it isn't actually need for backing up a
real car.  This makes it available for testing.

Test: build gordon_peak
Change-Id: I79bc2dafa1a8db579a1c3cc801bac8e4e1d01872
diff --git a/automotive/evs/1.0/default/android.hardware.automotive.evs@1.0-service.rc b/automotive/evs/1.0/default/android.hardware.automotive.evs@1.0-service.rc
index 8957ecf..16d521d 100644
--- a/automotive/evs/1.0/default/android.hardware.automotive.evs@1.0-service.rc
+++ b/automotive/evs/1.0/default/android.hardware.automotive.evs@1.0-service.rc
@@ -1,4 +1,4 @@
-service evs-hal-1-0 /vendor/bin/hw/android.hardware.automotive.evs@1.0-service
+service evs-hal-mock /vendor/bin/hw/android.hardware.automotive.evs@1.0-service
     class hal
-    user cameraserver
-    group camera
+    user automotive_evs
+    group automotive_evs