Adds selinux rules for ICarDisplayProxy service

Bug: 170401743
Test: m -j selinux_policy
Change-Id: Idf3f09d0bcf24de18d6eddb05e51991b4c5edbe8
diff --git a/private/file_contexts b/private/file_contexts
index 422d83a..ba50376 100644
--- a/private/file_contexts
+++ b/private/file_contexts
@@ -376,6 +376,7 @@
 /system/bin/snapuserd            u:object_r:snapuserd_exec:s0
 /system/bin/odsign               u:object_r:odsign_exec:s0
 /system/bin/vehicle_binding_util     u:object_r:vehicle_binding_util_exec:s0
+/system/bin/cardisplayproxyd     u:object_r:automotive_display_service_exec:s0
 
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 # Vendor files