platform: Refactoring libbox to use gRPC-based protocol

daemon/platform.go

@@ -0,0 +1,9 @@
+package daemon
+
+type PlatformHandler interface {
+	ServiceStop() error
+	ServiceReload() error
+	SystemProxyStatus() (*SystemProxyStatus, error)
+	SetSystemProxyEnabled(enabled bool) error
+	WriteDebugMessage(message string)
+}