fixup! Backup and restore device state between subsuite invocations.
fixup! Backup and restore device state between subsuite invocations.

Only save device state once per run.

mozilla-b2g/fxos-certsuite,mozilla-b2g/fxos-certsuite,ypwalter/fxos-certsuite,ypwalter/fxos-certsuite,cr/fxos-certsuite,ypwalter/fxos-certsuite,Conjuror/fxos-certsuite,Conjuror/fxos-certsuite,ShakoHo/fxos-certsuite,cr/fxos-certsuite,ShakoHo/fxos-certsuite,Conjuror/fxos-certsuite,mozilla-b2g/fxos-certsuite,askeing/fxos-certsuite,Conjuror/fxos-certsuite,askeing/fxos-certsuite,Conjuror/fxos-certsuite,cr/fxos-certsuite,ShakoHo/fxos-certsuite,ShakoHo/fxos-certsuite,Conjuror/fxos-certsuite,mozilla-b2g/fxos-certsuite,askeing/fxos-certsuite,oouyang/fxos-certsuite,askeing/fxos-certsuite,cr/fxos-certsuite,Conjuror/fxos-certsuite,askeing/fxos-certsuite,cr/fxos-certsuite,oouyang/fxos-certsuite,mozilla-b2g/fxos-certsuite,ypwalter/fxos-certsuite,ypwalter/fxos-certsuite,ShakoHo/fxos-certsuite,oouyang/fxos-certsuite,ypwalter/fxos-certsuite,oouyang/fxos-certsuite,cr/fxos-certsuite,oouyang/fxos-certsuite,cr/fxos-certsuite,ShakoHo/fxos-certsuite,askeing/fxos-certsuite,mozilla-b2g/fxos-certsuite,ShakoHo/fxos-certsuite,oouyang/fxos-certsuite,askeing/fxos-certsuite,oouyang/fxos-certsuite,mozilla-b2g/fxos-certsuite,ypwalter/fxos-certsuite