countdown:Disable double tap detection

With double tap enabled, one had to tap not too fast on
the watch to increment the minutes regularly. Otherwise,
some taps would be discarded.
This made using the countdown face without looking at the
screen for acknowledgement of taps impossible.
It was also impossible to increment minutes quickly, every second tap
would be discarded.

watch-faces/complication/countdown_face.c

@@ -218,7 +218,7 @@ void countdown_face_activate(void *context) {
 
     movement_request_tick_frequency(1);
     quick_ticks_running = false;
-    if (state->mode != cd_running && movement_enable_tap_detection_if_available(true)) {
+    if (state->mode != cd_running && movement_enable_tap_detection_if_available(false)) {
         state->tap_detection_ticks = TAP_DETECTION_SECONDS;
         state->has_tapped_once = false;
     }