SEPolicy updates for adding native flag namespace(media).

Test: add sepolicy, build, check GetServerConfigurableFlag function
Bug: 123658514
Change-Id: I798b0ef901068c53070e768305acd38118a7e886
diff --git a/private/property_contexts b/private/property_contexts
index 74134ac..6d78a07 100644
--- a/private/property_contexts
+++ b/private/property_contexts
@@ -173,6 +173,7 @@
 persist.device_config.input_native_boot. u:object_r:device_config_input_native_boot_prop:s0
 persist.device_config.netd_native.           u:object_r:device_config_netd_native_prop:s0
 persist.device_config.runtime_native.        u:object_r:device_config_runtime_native_prop:s0
+persist.device_config.media_native.          u:object_r:device_config_media_native_prop:s0
 
 apexd.                  u:object_r:apexd_prop:s0
 persist.apexd.          u:object_r:apexd_prop:s0