Add SELinux policies for remote_key_provisioning_native namespace.

We need to separate out the feature flags in use by remote key
provisioning daemon (RKPD). For this, I have set up a new namespace
remote_key_provisioning_native. This change adds the SELinux policies to
make sure appropriate permissions are present when accessing the feature
flag for read/write.

Change-Id: I9e73a623f847a058b6236dd0aa370a7f9a9e6da7
Test: TreeHugger
diff --git a/private/flags_health_check.te b/private/flags_health_check.te
index 64b595d..a26726d 100644
--- a/private/flags_health_check.te
+++ b/private/flags_health_check.te
@@ -27,6 +27,7 @@
 set_prop(flags_health_check, device_config_vendor_system_native_boot_prop)
 set_prop(flags_health_check, device_config_virtualization_framework_native_prop)
 set_prop(flags_health_check, device_config_memory_safety_native_prop)
+set_prop(flags_health_check, device_config_remote_key_provisioning_native_prop)
 
 # system property device_config_boot_count_prop is used for deciding when to perform server
 # configurable flags related disaster recovery. Mistakenly set up by unrelated components can, at a