Enable to edit timezone offset for recorded tracks.

Fixes #2014.

src/main/java/de/dennisguse/opentracks/ui/ZoneOffsetAdapter.java

@@ -0,0 +1,19 @@
+package de.dennisguse.opentracks.ui;
+
+
+import android.content.Context;
+import android.widget.ArrayAdapter;
+
+import androidx.annotation.NonNull;
+
+import java.time.ZoneOffset;
+import java.util.stream.IntStream;
+
+public class ZoneOffsetAdapter extends ArrayAdapter<ZoneOffset> {
+    public ZoneOffsetAdapter(@NonNull Context context, int resource) {
+        super(context, resource, IntStream.range(-12, +12)
+                .boxed()
+                .map(ZoneOffset::ofHours)
+                .toList());
+    }
+}