Cleanup using AndroidStudio analyze.

src/main/java/de/dennisguse/opentracks/content/data/DataField.java

@@ -34,7 +34,7 @@ public class DataField implements Parcelable {
         isWide = in.readByte() != 0;
     }
 
-    public static final Creator<DataField> CREATOR = new Creator<DataField>() {
+    public static final Creator<DataField> CREATOR = new Creator<>() {
         @Override
         public DataField createFromParcel(Parcel in) {
             return new DataField(in);

src/main/java/de/dennisguse/opentracks/content/data/Layout.java

@@ -58,7 +58,7 @@ public class Layout implements Parcelable {
         in.readList(dataFields, DataField.class.getClassLoader());
     }
 
-    public static final Creator<Layout> CREATOR = new Creator<Layout>() {
+    public static final Creator<Layout> CREATOR = new Creator<>() {
         @Override
         public Layout createFromParcel(Parcel in) {
             return new Layout(in);

src/main/java/de/dennisguse/opentracks/content/provider/ShareContentProvider.java

@@ -29,7 +29,6 @@ import de.dennisguse.opentracks.content.data.Track;
 import de.dennisguse.opentracks.content.data.TracksColumns;
 import de.dennisguse.opentracks.io.file.TrackFileFormat;
 import de.dennisguse.opentracks.io.file.exporter.TrackExporter;
-import de.dennisguse.opentracks.util.FileUtils;
 
 /**
  * A content provider that mimics the behavior of {@link androidx.core.content.FileProvider}, which shares virtual (non-existing) KML-files.