Turn off insecure socket policy configuration in the engine (#25299)

shell/platform/android/io/flutter/embedding/engine/loader/FlutterLoader.java

@@ -237,9 +237,6 @@ public class FlutterLoader {
       }
 
       shellArgs.add("--cache-dir-path=" + result.engineCachesPath);
-      if (!flutterApplicationInfo.clearTextPermitted) {
-        shellArgs.add("--disallow-insecure-connections");
-      }
       if (flutterApplicationInfo.domainNetworkPolicy != null) {
         shellArgs.add("--domain-network-policy=" + flutterApplicationInfo.domainNetworkPolicy);
       }

shell/platform/darwin/ios/framework/Source/FlutterDartProject.mm

@@ -134,12 +134,10 @@ flutter::Settings FLTDefaultSettingsForBundle(NSBundle* bundle) {
   }
 
   // Domain network configuration
-  NSDictionary* appTransportSecurity =
-      [mainBundle objectForInfoDictionaryKey:@"NSAppTransportSecurity"];
-  settings.may_insecurely_connect_to_all_domains =
-      [FlutterDartProject allowsArbitraryLoads:appTransportSecurity];
-  settings.domain_network_policy =
-      [FlutterDartProject domainNetworkPolicy:appTransportSecurity].UTF8String;
+  // Disabled in https://github.com/flutter/flutter/issues/72723.
+  // Re-enable in https://github.com/flutter/flutter/issues/54448.
+  settings.may_insecurely_connect_to_all_domains = true;
+  settings.domain_network_policy = "";
 
   // SkParagraph text layout library
   NSNumber* enableSkParagraph = [mainBundle objectForInfoDictionaryKey:@"FLTEnableSkParagraph"];