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test-exempt: reverted change after checking benchmarks.

Preliminary results on the Pixel device: this slightly regressed avergae performance. The worst/99% may have gotten better though, so I will continue to monitor:

https://flutter-flutter-perf.skia.org/e/?queries=device_type%3DPixel_7_Pro%26sub_result%3D90th_percentile_frame_rasterizer_time_millis%26sub_result%3D99th_percentile_frame_rasterizer_time_millis%26sub_result%3Daverage_frame_rasterizer_time_millis%26sub_result%3Dworst_frame_rasterizer_time_millis%26test%3Danimated_advanced_blend_perf__timeline_summary&selected=commit%3D39605%26name%3D%252Carch%253Dintel%252Cbranch%253Dmaster%252Cconfig%253Ddefault%252Cdevice_type%253DPixel_7_Pro%252Cdevice_version%253Dnone%252Chost_type%253Dlinux%252Csub_result%253Dworst_frame_rasterizer_time_millis%252Ctest%253Danimated_advanced_blend_perf__timeline_summary%252C