Use nanosecond timestamp for sensors (thanks @1bsyl!)

src/sensor/android/SDL_androidsensor.c

@@ -156,7 +156,7 @@ static void SDL_ANDROID_SensorUpdate(SDL_Sensor *sensor)
     int events;
     ASensorEvent event;
     struct android_poll_source *source;
-    Uint64 timestamp = SDL_GetTicks();
+    Uint64 timestamp = SDL_GetTicksNS();
 
     if (ALooper_pollAll(0, NULL, &events, (void **)&source) == LOOPER_ID_USER) {
         SDL_zero(event);

src/sensor/coremotion/SDL_coremotionsensor.m

@@ -137,7 +137,7 @@ static int SDL_COREMOTION_SensorOpen(SDL_Sensor *sensor, int device_index)
 
 static void SDL_COREMOTION_SensorUpdate(SDL_Sensor *sensor)
 {
-    Uint64 timestamp = SDL_GetTicks();
+    Uint64 timestamp = SDL_GetTicksNS();
 
     switch (sensor->type) {
     case SDL_SENSOR_ACCEL:

src/sensor/windows/SDL_windowssensor.c

@@ -143,7 +143,7 @@ static HRESULT STDMETHODCALLTYPE ISensorEventsVtbl_OnStateChanged(ISensorEvents
 static HRESULT STDMETHODCALLTYPE ISensorEventsVtbl_OnDataUpdated(ISensorEvents *This, ISensor *pSensor, ISensorDataReport *pNewData)
 {
     int i;
-    Uint64 timestamp = SDL_GetTicks();
+    Uint64 timestamp = SDL_GetTicksNS();
 
     SDL_LockSensors();
     for (i = 0; i < SDL_num_sensors; ++i) {