Add spec for AnimationsDebugModule (#24915)

Summary:
Part of #24875.

## Changelog

[General] [Added] - Add TM spec for AnimationsDebugModule
Pull Request resolved: https://github.com/facebook/react-native/pull/24915

Reviewed By: RSNara

Differential Revision: D15421499

Pulled By: fkgozali

fbshipit-source-id: f52780773f5947097b75c4d776a0b80e0bc1d387

Libraries/NativeModules/specs/NativeAnimationsDebugModule.js

@@ -0,0 +1,21 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ * @format
+ */
+
+'use strict';
+
+import type {TurboModule} from 'RCTExport';
+import * as TurboModuleRegistry from 'TurboModuleRegistry';
+
+export interface Spec extends TurboModule {
+  +startRecordingFps: () => void;
+  +stopRecordingFps: (animationStopTimeMs: number) => void;
+}
+
+export default TurboModuleRegistry.get<Spec>('AnimationsDebugModule');