Mahi: Make sure that summary is requested after question is answered

When user ask question from the menu card, the request to summary is
cancelled due to the recent change (crrev/c/5583509). This CL makes sure
that summary is generated after the question is answered.

Bug: b:345621992
Change-Id: I904c3d5d79c4609ec748ab554953138537f5da38
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5610012


Reviewed-by: Alex Newcomer <newcomer@chromium.org>
Commit-Queue: Andre Le <leandre@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1312331}