Revert "Revert "Dsiable CPU/GPU measurement on BackdropFilter test (#41736)" (#41780)" (#41795)

This reverts commit 19c08e891d2c862b685c6803b6cce73d1e386b54.

The attempted revert doesn't fix the problem, so we'll reland.

dev/devicelab/bin/tasks/backdrop_filter_perf_ios__timeline_summary.dart

diff --git a/dev/devicelab/bin/tasks/backdrop_filter_perf_ios__timeline_summary.dart b/dev/devicelab/bin/tasks/backdrop_filter_perf_ios__timeline_summary.dart
index 20dc420..840c775 100644
--- a/dev/devicelab/bin/tasks/backdrop_filter_perf_ios__timeline_summary.dart
+++ b/dev/devicelab/bin/tasks/backdrop_filter_perf_ios__timeline_summary.dart
@@ -10,5 +10,5 @@
 
 Future<void> main() async {
   deviceOperatingSystem = DeviceOperatingSystem.ios;
-  await task(createBackdropFilterPerfTest(needsMeasureCpuGpu: true));
+  await task(createBackdropFilterPerfTest());
 }