Everywhere: Remove the AK:: qualifier from Stream usages

Author: https://github.com/timschumi
Commit: 43f98ac6e1
Pull-request: https://github.com/SerenityOS/serenity/pull/17406
Reviewed-by: https://github.com/linusg

Meta/Lagom/Tools/CodeGenerators/IPCCompiler/main.cpp

@@ -338,7 +338,7 @@ public:)~~~");
     static i32 static_message_id() { return (int)MessageID::@message.pascal_name@; }
     virtual const char* message_name() const override { return "@endpoint.name@::@message.pascal_name@"; }
 
-    static ErrorOr<NonnullOwnPtr<@message.pascal_name@>> decode(AK::Stream& stream, Core::LocalSocket& socket)
+    static ErrorOr<NonnullOwnPtr<@message.pascal_name@>> decode(Stream& stream, Core::LocalSocket& socket)
     {
         IPC::Decoder decoder { stream, socket };)~~~");