Removed unnecessary xml layout files, add "about" title to about activity

Author: maartenvang

app/src/main/java/com/icapps/vkmusic/activity/MainActivity.java

@@ -274,6 +274,7 @@ private void createNavigationDrawer() {
                 .withSelectable(false)
                 .withOnDrawerItemClickListener((view, position, drawerItem) -> {
                     new LibsBuilder()
+                            .withActivityTitle(getString(R.string.about))
                             .withActivityStyle(Libs.ActivityStyle.LIGHT_DARK_TOOLBAR)
                             .start(MainActivity.this);
                     return false;