Sensors: Fix excessive altitude gain by enforcing SAMPLING_PERIOD on internal barometer.

On some modern devices like Pixel 8 Pro, the internal pressure sensor ignores the requested sampling period in registerListener and sends data at high frequency (~50Hz). This floods the AltitudeChangeHandler with noise, causing absurdly high altitude gain (e.g., 38km for a flat run).
This commit adds a manual throttle in BarometerInternal to strictly respect the SAMPLING_PERIOD (5s), allowing the exponential smoothing to work as intended.

src/main/java/de/dennisguse/opentracks/sensors/driver/BarometerInternal.java

@@ -9,6 +9,8 @@ import android.util.Log;
 
 import androidx.annotation.NonNull;
 
+import java.time.Duration;
+import java.time.Instant;
 import java.util.concurrent.TimeUnit;
 
 import de.dennisguse.opentracks.data.models.AtmosphericPressure;
@@ -17,12 +19,14 @@ public class BarometerInternal implements Driver {
 
     private static final String TAG = BarometerInternal.class.getSimpleName();
 
-    private static final int SAMPLING_PERIOD = (int) TimeUnit.SECONDS.toMicros(5);
+    private static final Duration SAMPLING_PERIOD = Duration.ofSeconds(5);
 
     private final DriverObserver<AtmosphericPressure> observer;
 
     private android.hardware.SensorManager sensorService;
 
+    private Instant lastEventTime = Instant.EPOCH;
+
     private final SensorEventListener sensorEventListener = new SensorEventListener() {
         @Override
         public void onSensorChanged(SensorEvent event) {
@@ -31,6 +35,13 @@ public class BarometerInternal implements Driver {
                 return;
             }
 
+            Instant currentTime = Instant.now();
+
+            if (lastEventTime.plus(SAMPLING_PERIOD).isAfter(currentTime)) {
+                return;
+            }
+
+            lastEventTime = currentTime;
             observer.onDataReceived(AtmosphericPressure.ofHPA(event.values[0]));
         }
 
@@ -48,8 +59,9 @@ public class BarometerInternal implements Driver {
     public void connect(Context context, Handler handler, String addressIgnored) {
         sensorService = (android.hardware.SensorManager) context.getSystemService(Context.SENSOR_SERVICE);
         Sensor pressureSensor = sensorService.getDefaultSensor(Sensor.TYPE_PRESSURE);
+        int samplingPeriodUs = (int) TimeUnit.MICROSECONDS.convert(SAMPLING_PERIOD);
 
-        if (pressureSensor != null && sensorService.registerListener(sensorEventListener, pressureSensor, SAMPLING_PERIOD, handler)) {
+        if (pressureSensor != null && sensorService.registerListener(sensorEventListener, pressureSensor, samplingPeriodUs, handler)) {
             observer.onConnected(null, null);
             return;
         }