Set album list item image size to fixed value.

Value is taken from currently playing view.

Signed-off-by: Yahor Berdnikau <egorr.berd@gmail.com>

ultrasonic/src/main/res/layout/album_list_item.xml

@@ -8,8 +8,8 @@
 
     <ImageView
             a:id="@+id/album_coverart"
-            a:layout_width="wrap_content"
-            a:layout_height="wrap_content"
+            a:layout_width="64dp"
+            a:layout_height="64dp"
             a:layout_gravity="left|center_vertical"
             a:paddingLeft="3dip"/>