[lensoverlay] Add task completion gen204s

Bug: 339455387
Change-Id: I6034d8133a03289cf9b06091e5653b8247c7d368
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5763336


Commit-Queue: Jason Hu <hujasonx@google.com>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Ali Stanfield <stanfield@google.com>
Cr-Commit-Position: refs/heads/main@{#1339973}