online-accounts: Set label relationship for listboxes

Set the label relationships so that screen readers
read the headers for the listboxes.
11 jobs for <span class="ref-name">online-accounts-a11y</span> in 5 minutes and 5 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Build
passed #184985
build

00:02:13

 
  Test
passed #184987
asan

00:02:51

passed #184986
test

00:00:44

 
  Manual
manual #184992
allowed to fail manual
armv8
manual #184988
allowed to fail manual
flatpak
manual #184991
allowed to fail manual
msan
manual #184993
allowed to fail manual
ppc64le
manual #184989
allowed to fail manual
tsan
manual #184990
allowed to fail manual
ubsan
 
  Review
manual #184994
allowed to fail manual
review
manual #184995
allowed to fail manual
stop_review