Memory test on scrolling large images quickly (#46184)

dev/devicelab/bin/tasks/fast_scroll_large_images__memory.dart

diff --git a/dev/devicelab/bin/tasks/fast_scroll_large_images__memory.dart b/dev/devicelab/bin/tasks/fast_scroll_large_images__memory.dart
new file mode 100644
index 0000000..b07f163
--- /dev/null
+++ b/dev/devicelab/bin/tasks/fast_scroll_large_images__memory.dart
@@ -0,0 +1,41 @@
+// Copyright 2014 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'dart:async';
+
+import 'package:flutter_devicelab/framework/adb.dart';
+import 'package:flutter_devicelab/framework/framework.dart';
+import 'package:flutter_devicelab/framework/utils.dart';
+import 'package:flutter_devicelab/tasks/perf_tests.dart';
+
+const String kPackageName = 'com.example.macrobenchmarks';
+const String kActivityName = 'com.example.macrobenchmarks.MainActivity';
+
+class FastScrollLargeImagesMemoryTest extends MemoryTest {
+  FastScrollLargeImagesMemoryTest()
+      : super(
+          '${flutterDirectory.path}/dev/benchmarks/macrobenchmarks',
+          'test_memory/large_images.dart', kPackageName,
+        );
+
+  @override
+  AndroidDevice get device => super.device;
+
+  @override
+  int get iterationCount => 5;
+
+  @override
+  Future<void> useMemory() async {
+    await launchApp();
+    await recordStart();
+    await device.shellExec('input', <String>['swipe', '0 1500 0 0 50']);
+    await Future<void>.delayed(const Duration(milliseconds: 10000));
+    await recordEnd();
+  }
+}
+
+Future<void> main() async {
+  deviceOperatingSystem = DeviceOperatingSystem.android;
+  await task(FastScrollLargeImagesMemoryTest().run);
+}

dev/devicelab/manifest.yaml

diff --git a/dev/devicelab/manifest.yaml b/dev/devicelab/manifest.yaml
index cf6f8cd..7df2641 100644
--- a/dev/devicelab/manifest.yaml
+++ b/dev/devicelab/manifest.yaml
@@ -670,6 +670,12 @@
     stage: devicelab
     required_agent_capabilities: ["linux/android"]
 
+  fast_scroll_large_images__memory:
+    description: >
+      Measures memory usage for scrolling through a list of large images.
+    stage: devicelab
+    required_agent_capabilities: ["mac/android"]
+
   analyzer_benchmark:
     description: >
       Measures the speed of Dart analyzer.