Change checks fetch timeout from 10s to 16s
Change checks fetch timeout from 10s to 16s

Android's internal timeout is 15s and they are currently hitting this
timeout more often than usual. Gerrit does not care much about whether
the timeout is 10s or 16s. So let's just change it to something that
works well for Android and that mitigates their current problems.

Release-Notes: skip
Google-Bug-Id: b/250575925
Change-Id: I7f5fe75559cab6f4f7c6d4aa23e55579cba947d1

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