Move system property rules to private

public/property split is landed to selectively export public types to
vendors. So rules happening within system should be in private. This
introduces private/property.te and moves all allow and neverallow rules
from any coredomains to system defiend properties.

Bug: 150331497
Test: system/sepolicy/tools/build_policies.sh
Change-Id: I0d929024ae9f4ae3830d4bf3d59e999febb22cbe
Merged-In: I0d929024ae9f4ae3830d4bf3d59e999febb22cbe
(cherry picked from commit 42c7d8966cc5f76c84c001c5af787cbfade736c8)
diff --git a/private/flags_health_check.te b/private/flags_health_check.te
index fb41aff..18dde09 100644
--- a/private/flags_health_check.te
+++ b/private/flags_health_check.te
@@ -1,3 +1,27 @@
 typeattribute flags_health_check coredomain;
 
 init_daemon_domain(flags_health_check)
+
+set_prop(flags_health_check, device_config_boot_count_prop)
+set_prop(flags_health_check, device_config_reset_performed_prop)
+set_prop(flags_health_check, device_config_runtime_native_boot_prop)
+set_prop(flags_health_check, device_config_runtime_native_prop)
+set_prop(flags_health_check, device_config_input_native_boot_prop)
+set_prop(flags_health_check, device_config_netd_native_prop)
+set_prop(flags_health_check, device_config_activity_manager_native_boot_prop)
+set_prop(flags_health_check, device_config_media_native_prop)
+set_prop(flags_health_check, device_config_storage_native_boot_prop)
+set_prop(flags_health_check, device_config_sys_traced_prop)
+set_prop(flags_health_check, device_config_window_manager_native_boot_prop)
+set_prop(flags_health_check, device_config_configuration_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
+# wrong timing, trigger server configurable flag related disaster recovery, which will override
+# server configured values of all flags with default values.
+neverallow { domain -init -flags_health_check } device_config_boot_count_prop:property_service set;
+
+# system property device_config_reset_performed_prop is used for indicating whether server
+# configurable flags have been reset during booting. Mistakenly modified by unrelated components can
+# cause bad server configurable flags synced back to device.
+neverallow { domain -init -flags_health_check } device_config_reset_performed_prop:property_service set;