Refactor am services

Use the new service naming scheme.
Remove redundant casts and template specifiers in response.Push.

app/src/main/cpp/skyline/services/am/controller/IApplicationFunctions.h

@@ -0,0 +1,19 @@
+#pragma once
+
+#include <services/base_service.h>
+#include <services/serviceman.h>
+
+namespace skyline::service::am {
+    /**
+     * @brief This has functions that are used to notify an application about it's state (https://switchbrew.org/wiki/Applet_Manager_services#IApplicationFunctions)
+     */
+    class IApplicationFunctions : public BaseService {
+      public:
+        IApplicationFunctions(const DeviceState &state, ServiceManager &manager);
+
+        /**
+         * @brief This returns if the application is running or not, always returns true (https://switchbrew.org/wiki/Applet_Manager_services#NotifyRunning)
+         */
+        void NotifyRunning(type::KSession &session, ipc::IpcRequest &request, ipc::IpcResponse &response);
+    };
+}