[rcore][android] Fix GESTURE_NONE not being reported when touch points are released (#5010)

The gesture system was not handling the case when all touch points are released (pointCount == 0), causing GESTURE_NONE to never be reported on Android.

This adds an else if block in ProcessGestureEvent() to handle pointCount == 0 and properly reset the gesture state to GESTURE_NONE.

Fixes issue #5010 where GetGestureDetected() would not return GESTURE_NONE after all touch points were released.

src/rgestures.h

@@ -402,6 +402,10 @@ void ProcessGestureEvent(GestureEvent event)
             GESTURES.current = GESTURE_NONE;
         }
     }
+         else if (GESTURES.Touch.pointCount == 0) // No touch points
+              {
+     GESTURES.current = GESTURE_NONE;
+ }
     else if (GESTURES.Touch.pointCount > 2)     // More than two touch points
     {
         // TODO: Process gesture events for more than two points