Enable throw-if-cmd-fail on device setup

For some reason the default behavior of the infra is to suppress exceptions during the device setup (target preparer), which means that if something does wrong we get random test failures, instead of clean setup failures

Fixes: 425227120
Flag: EXEMPT Test only
Test: atest WMShellFlickerTests
Change-Id: If42257e514252c2676f03707e3c45b1a6c3edb0c