Add ro.surface_flinger.display_primary*

The ro.surface_flinger.display_primary* properties are added to
property_contexts. Because these properties are located in vendor
partition, but surfaceflinger service which use these properties
is in the system partition.

Bug: 124531214
Test: m -j && boot test
Change-Id: If90c4bc75796d8966bbf3ee2e3bab39145395800
diff --git a/public/property_contexts b/public/property_contexts
index 836b2a4..bea017a 100644
--- a/public/property_contexts
+++ b/public/property_contexts
@@ -370,3 +370,7 @@
 ro.surface_flinger.vsync_sf_event_phase_offset_ns u:object_r:exported_default_prop:s0 int
 ro.surface_flinger.wcg_composition_dataspace u:object_r:exported_default_prop:s0 int
 ro.surface_flinger.wcg_composition_pixel_format u:object_r:exported_default_prop:s0 int
+ro.surface_flinger.display_primary_red u:object_r:exported_default_prop:s0 string
+ro.surface_flinger.display_primary_green u:object_r:exported_default_prop:s0 string
+ro.surface_flinger.display_primary_blue u:object_r:exported_default_prop:s0 string
+ro.surface_flinger.display_primary_white u:object_r:exported_default_prop:s0 string