wifi-panel: Create rfkill dbus proxy synchronously

Otherwise, the “No Wi-Fi Adapter Found” screen is shown for a brief period
on Airplane Mode
11 jobs for wip/sadiq/wifi-panel-fix in 7 minutes and 10 seconds (queued for 3 seconds)
latest
Status Name Job ID Coverage
  Build
passed build #325127

00:04:07

 
  Test
passed asan #325129

00:03:02

passed test #325128

00:01:28

 
  Manual
manual armv8 #325134
allowed to fail manual
manual flatpak #325130
allowed to fail manual
manual msan #325133
allowed to fail manual
manual ppc64le #325135
allowed to fail manual
manual tsan #325131
allowed to fail manual
manual ubsan #325132
allowed to fail manual
 
  Review
manual review #325136
allowed to fail manual
manual stop_review #325137
allowed to fail manual