backends: Update to new "output" setting for tablets/touchscreens

2 jobs for <span class="ref-name">wip/carlosg/abs-input-mapper</span> in 7 minutes and 28 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build
passed #162279
build-mutter

00:04:49

 
  Test
passed #162280
test-mutter

00:02:39