Give resume_on_reboot key as separate context

As part of the keystore2 requirement, we give the keys used for
resume on reboot a separate context in keystore. And grant system
server the permission to generate, use and delete it.

Bug: 172780686
Test: resume on reboot works after using keystore2
Change-Id: I6b47625a0864a4aa87b815c6d2009cc19ad151a0
diff --git a/private/system_server.te b/private/system_server.te
index c0c7c16..7d26410 100644
--- a/private/system_server.te
+++ b/private/system_server.te
@@ -891,6 +891,15 @@
 	use
 };
 
+# Allow lock_settings service to manage RoR keys.
+allow system_server resume_on_reboot_key:keystore2_key {
+	delete
+	get_info
+	rebind
+	update
+	use
+};
+
 # Allow system server to search and write to the persistent factory reset
 # protection partition. This block device does not get wiped in a factory reset.
 allow system_server block_device:dir search;