Toggle location of settings and minimize buttons

on volume controller layout.

To have the minimize button at the end like on the volume bar layout,
and to avoid two minimize buttons to close to each other.

Squeezer/src/main/res/layout/volume_adjust.xml

@@ -36,7 +36,7 @@
         android:layout_width="36dp"
         android:layout_height="36dp"
         app:layout_constraintTop_toTopOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
         app:icon="@drawable/ic_action_down"/>
 
     <TextView
@@ -55,7 +55,7 @@
         android:layout_width="36dp"
         android:layout_height="36dp"
         app:layout_constraintTop_toTopOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
         app:icon="@drawable/ic_settings"/>
 
     <uk.org.ngo.squeezer.widget.Croller