Add persist.device_config.storage_native_boot.smart_idle_maint_enabled property policies

Add policies to set persist.device_config.storage_native_boot.smart_idle_maint_enabled property.

Bug: 202283480
Bug: 181079477
Bug: 215443809
Change-Id: I998e6dca950a8ceebb5fbc39568e3e8d6b86e8ce
diff --git a/private/system_server.te b/private/system_server.te
index 275bb6f..a927a83 100644
--- a/private/system_server.te
+++ b/private/system_server.te
@@ -736,6 +736,7 @@
 set_prop(system_server, device_config_connectivity_prop)
 set_prop(system_server, device_config_surface_flinger_native_boot_prop)
 set_prop(system_server, device_config_virtualization_framework_native_prop)
+set_prop(system_server, smart_idle_maint_enabled_prop)
 
 # Allow query ART device config properties
 get_prop(system_server, device_config_runtime_native_boot_prop)