Added new folder icon

app/src/main/res/drawable/baseline_create_new_folder_24.xml

@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportWidth="24.0"
+        android:viewportHeight="24.0"
+        android:tint="?attr/colorControlNormal">
+    <path
+        android:fillColor="@android:color/white"
+        android:pathData="M20,6h-8l-2,-2L4,4c-1.11,0 -1.99,0.89 -1.99,2L2,18c0,1.11 0.89,2 2,2h16c1.11,0 2,-0.89 2,-2L22,8c0,-1.11 -0.89,-2 -2,-2zM19,14h-3v3h-2v-3h-3v-2h3L14,9h2v3h3v2z"/>
+</vector>

app/src/main/res/layout/fragment_folders.xml

@@ -135,7 +135,7 @@
         android:layout_height="wrap_content"
         android:layout_gravity="end|bottom"
         android:layout_margin="@dimen/fab_padding"
-        android:src="@drawable/baseline_add_24"
+        android:src="@drawable/baseline_create_new_folder_24"
         android:tint="@color/colorActionForeground"
         android:tooltipText="@string/title_add"
         app:backgroundTint="?attr/colorAccent" />