Add benchmark case for RasterCache (#103338)

diff --git a/TESTOWNERS b/TESTOWNERS
index 138354d..0eea918 100644
--- a/TESTOWNERS
+++ b/TESTOWNERS
@@ -70,6 +70,7 @@
 /dev/devicelab/bin/tasks/platform_views_scroll_perf__timeline_summary.dart @zanderso @flutter/engine
 /dev/devicelab/bin/tasks/plugin_dependencies_test.dart @jmagman @flutter/tool
 /dev/devicelab/bin/tasks/routing_test.dart @zanderso @flutter/tool
+/dev/devicelab/bin/tasks/raster_cache_use_memory_perf__e2e_summary.dart @flar @flutter/engine
 /dev/devicelab/bin/tasks/textfield_perf__e2e_summary.dart @zanderso @flutter/engine
 /dev/devicelab/bin/tasks/web_size__compile_test.dart @yjbanov @flutter/web
 /dev/devicelab/bin/tasks/opacity_peephole_col_of_rows_perf__e2e_summary.dart @flar @flutter/engine