sepolicy: allow vendor system native boot experiments property

Grant system_server and flags_health_check permission to set the
properties that correspond to vendor system native boot experiments.

Bug: 241730607
Test: Build
Merged-In: Idc2334534c2d42a625b451cfce488d7d7a651036
Change-Id: I3e98f1b05058245cad345061d801ecd8de623109
diff --git a/private/property_contexts b/private/property_contexts
index 4341bc3..c6edbe3 100644
--- a/private/property_contexts
+++ b/private/property_contexts
@@ -262,6 +262,7 @@
 persist.device_config.surface_flinger_native_boot.  u:object_r:device_config_surface_flinger_native_boot_prop:s0
 persist.device_config.swcodec_native.               u:object_r:device_config_swcodec_native_prop:s0
 persist.device_config.vendor_system_native.         u:object_r:device_config_vendor_system_native_prop:s0
+persist.device_config.vendor_system_native_boot.    u:object_r:device_config_vendor_system_native_boot_prop:s0
 persist.device_config.virtualization_framework_native. u:object_r:device_config_virtualization_framework_native_prop:s0
 persist.device_config.window_manager_native_boot.   u:object_r:device_config_window_manager_native_boot_prop:s0
 persist.device_config.memory_safety_native.         u:object_r:device_config_memory_safety_native_prop:s0