Merge remote-tracking branch 'origin/main' into proto-ipv6-overlay

Resolve conflict in setupAndroidRoutes: merge IPv6 fake IP route
with the explicit fake IP route storage from #5865.

Notifier now stores a slice of fake IP routes (v4 + v6) via
SetFakeIPRoutes to preserve the stale route re-injection fix.

client/internal/routemanager/notifier/notifier_ios.go

@@ -34,6 +34,10 @@ func (n *Notifier) SetInitialClientRoutes([]*route.Route, []*route.Route) {
 	// iOS doesn't care about initial routes
 }
 
+func (n *Notifier) SetFakeIPRoutes([]*route.Route) {
+	// Not used on iOS
+}
+
 func (n *Notifier) OnNewRoutes(route.HAMap) {
 	// Not used on iOS
 }