Make the Rust client the sole app

app/touch/flick-cancelled.touch

@@ -0,0 +1,11 @@
+# `flick-120hz.touch` to the sample, with the platform taking the gesture
+# away instead of the finger lifting -- Android's `ACTION_CANCEL`, which
+# is what the swipe up from the bottom edge to leave the app delivers
+# after its moves. Nothing may follow from it: no tap, no selection and,
+# the one that showed on Iris's phone, no fling.
+0 down 540 1000
+4 move 540 1040
+8 move 540 1086
+12 move 540 1138
+16 move 540 1196
+20 cancel 540 1196