Test Assertions 3.1, 3.2

These are basically just copies of the `pointerevent_pointermove_*` files with updates to test `pointerup` instead of `pointermove`.
I assumed this check was to prevent the test from incorrectly failing if the tester used two pointing devices (even though they shouldn't). I actually wouldn't have written the assertion below if I had written this from scratch. I'm fine removing either one though.