Add: simple seekbar listener

Allows to make cleaner code when you have more than one seekbar

app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/utils/SimpleSeekBarListener.java

@@ -0,0 +1,17 @@
+package net.kdt.pojavlaunch.utils;
+
+import android.widget.SeekBar;
+
+/**
+ * Most interfaces implementations of {@link SeekBar.OnSeekBarChangeListener}
+ * only implement the onProgressChanged method. This class provides a default for other methods.
+ */
+public interface SimpleSeekBarListener extends SeekBar.OnSeekBarChangeListener {
+    @Override
+    default void onStartTrackingTouch(android.widget.SeekBar seekBar) {
+    }
+
+    @Override
+    default void onStopTrackingTouch(android.widget.SeekBar seekBar) {
+    }
+}