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So it won't lost connection due to timeout, but will still be closed if
the sender side crashes or send invalid message.

Meanwhile, fix a bug in the unittests that causes socket not destroyed
on the sequence by specifically calling Stop.

Bug: internal: 142752569
Bug: internal: 142443304
Test: On device and unittests.
Change-Id: I9a75d9727cf7abb3f0acc146b1028edfb3afb45a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1865532Reviewed-by: Kenneth MacKay <kmackay@chromium.org>
Reviewed-by: Yuchen Liu <yucliu@chromium.org>
Commit-Queue: Kehuang Li <kehuangli@chromium.org>
Cr-Commit-Position: refs/heads/master@{#706621}