Add per app proxy support for auto redirect

experimental/libbox/platform.go

@@ -22,6 +22,8 @@ type PlatformInterface interface {
 	IncludeAllNetworks() bool
 	ReadWIFIState() *WIFIState
 	ClearDNSCache()
+	PerAppProxyList() (IntegerIterator, error)
+	PerAppProxyMode() int32
 }
 
 type TunInterface interface {
@@ -54,6 +56,11 @@ type NetworkInterfaceIterator interface {
 	HasNext() bool
 }
 
+type IntegerIterator interface {
+	Next() int32
+	HasNext() bool
+}
+
 type OnDemandRule interface {
 	Target() int32
 	DNSSearchDomainMatch() StringIterator