ShakeWake: Fixed instant wake after sleep issue in certain positions (#1691)

* ShakeWake: Fixed instant wake after sleep issue in certain positions

Add lastX var to track the previous x acceleration for correct calculation of speed.

Reorder axes for clarity.

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Co-authored-by: Isaac <114504394+isaacc27@users.noreply.github.com>
Co-authored-by: FintasticMan <52415484+FintasticMan@users.noreply.github.com>

src/components/motion/MotionController.h

@@ -67,6 +67,7 @@ namespace Pinetime {
       TickType_t lastTime = 0;
       TickType_t time = 0;
 
+      int16_t lastX = 0;
       int16_t x = 0;
       int16_t lastYForRaiseWake = 0;
       int16_t lastY = 0;