Add search function at access control

Fix the issues with the profile add button to cover the edit button

Adapt LoadBalance and Relay

Add arm

Fix android notification icon error

lib/models/clash_config.dart

@@ -16,7 +16,7 @@ class Tun with _$Tun {
   const factory Tun({
     @Default(false) bool enable,
     @Default(appName) String device,
-    @Default(TunStack.mixed) TunStack stack,
+    @Default(TunStack.gvisor) TunStack stack,
     @JsonKey(name: "dns-hijack") @Default(["any:53"]) List<String> dnsHijack,
   }) = _Tun;