Add slider_perf_android task to ci.yaml (#125540)

This adds `devicelab` task `slider_perf_android` to `.ci.yaml`, which was added in flutter/flutter#125296

Author: TahaTesser

.ci.yaml

@@ -2238,6 +2238,16 @@ targets:
         ["devicelab", "android", "linux"]
       task_name: android_picture_cache_complexity_scoring_perf__timeline_summary
 
+  - name: Linux_android slider_perf_android
+    bringup: true
+    recipe: devicelab/devicelab_drone
+    presubmit: false
+    timeout: 60
+    properties:
+      tags: >
+        ["devicelab", "android", "linux"]
+      task_name: slider_perf_android
+
   - name: Linux_android platform_channels_benchmarks
     recipe: devicelab/devicelab_drone
     presubmit: false

TESTOWNERS

@@ -90,6 +90,7 @@
 /dev/devicelab/bin/tasks/web_size__compile_test.dart @yjbanov @flutter/web
 /dev/devicelab/bin/tasks/wide_gamut_ios.dart @gaaclarke @flutter/engine
 /dev/devicelab/bin/tasks/animated_blur_backdrop_filter_perf__timeline_summary.dart @jonahwilliams @flutter/engine
+/dev/devicelab/bin/tasks/slider_perf_android.dart @tahatesser @flutter/framework
 
 ## Windows Android DeviceLab tests
 /dev/devicelab/bin/tasks/basic_material_app_win__compile.dart @zanderso @flutter/tool