fix: remove redundant D-Bus policy rules for security hardening

- Remove allow own rule from default policy (already defined in root policy)
- Remove redundant interface-specific allow rules
- Keep only the minimal send_destination rule for default policy

Log: Clean up D-Bus configuration by removing redundant permission rules

Author: itsXuSt

deepin-system-monitor-system-server/misc/org.deepin.SystemMonitorSystemServer.conf

@@ -8,10 +8,6 @@
 	</policy>
 	<!-- Allow anyone to invoke methods on the interfaces -->
 	<policy context="default">
-		<allow own="org.deepin.SystemMonitorSystemServer" />
 		<allow send_destination="org.deepin.SystemMonitorSystemServer" />
-		<allow send_destination="org.deepin.SystemMonitorSystemServer" send_interface="org.deepin.SystemMonitorSystemServer" />
-		<allow send_destination="org.deepin.SystemMonitorSystemServer" send_interface="org.freedesktop.DBus.Properties" />
-		<allow send_destination="org.deepin.SystemMonitorSystemServer" send_interface="org.freedesktop.DBus.Introspectable" />
 	</policy>
 </busconfig>