add: custom preference layout for image selector and remover

AnkiDroid/src/main/res/layout/preference_deck_picker_background.xml

@@ -0,0 +1,40 @@
+<RelativeLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    >
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal"
+        android:layout_alignParentStart="true"
+        android:layout_marginEnd="72dp"
+        android:id="@+id/deck_picker_background_image_selector">
+
+        <ImageView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center_vertical"
+            android:src="@drawable/wallpaper_icon" />
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="24dp"
+            android:textAppearance="?android:attr/textAppearanceListItem"
+            android:text="@string/choose_an_image" />
+
+    </LinearLayout>
+
+    <ImageView
+        android:paddingStart="16dp"
+        android:paddingEnd="32dp"
+        android:id="@+id/deck_picker_background_image_remover"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_alignParentEnd="true"
+        android:src="@drawable/close_icon"
+         />
+
+</RelativeLayout>