Updated correct tasks for test ownership fix (#129812)

Update a few of the tasks that are mislabeled as this will cause failures if that change is merged first.

This PR is needed before: https://github.com/flutter/cocoon/pull/2898

*List which issues are fixed by this PR. You must list at least one issue.*
Part of https://github.com/flutter/flutter/issues/125328

*If you had to change anything in the [flutter/tests] repo, include a link to the migration guide as per the [breaking change policy].*

TESTOWNERS

@@ -86,6 +86,7 @@
 /dev/devicelab/bin/tasks/raster_cache_use_memory_perf__e2e_summary.dart @flar @flutter/engine
 /dev/devicelab/bin/tasks/routing_test.dart @zanderso @flutter/tool
 /dev/devicelab/bin/tasks/shader_mask_cache_perf__e2e_summary.dart @flar @flutter/engine
+/dev/devicelab/bin/tasks/spell_check_test_ios.dart @camsim99 @flutter/android
 /dev/devicelab/bin/tasks/spell_check_test.dart @camsim99 @flutter/android
 /dev/devicelab/bin/tasks/textfield_perf__e2e_summary.dart @zanderso @flutter/engine
 /dev/devicelab/bin/tasks/web_size__compile_test.dart @yjbanov @flutter/web
@@ -220,6 +221,7 @@
 /dev/devicelab/bin/tasks/flutter_gallery_macos__start_up.dart @cbracken @flutter/desktop
 /dev/devicelab/bin/tasks/flutter_gallery_win_desktop__compile.dart @yaakovschectman @flutter/desktop
 /dev/devicelab/bin/tasks/flutter_gallery_win_desktop__start_up.dart @yaakovschectman @flutter/desktop
+/dev/devicelab/bin/tasks/flutter_tool_startup.dart @jensjoha @flutter/tool
 /dev/devicelab/bin/tasks/flutter_tool_startup__linux.dart @jensjoha @flutter/tool
 /dev/devicelab/bin/tasks/flutter_tool_startup__macos.dart @jensjoha @flutter/tool
 /dev/devicelab/bin/tasks/flutter_tool_startup__windows.dart @jensjoha @flutter/tool