Fix icon placement for section switches

The way View.createSkeleton() works doesn't play nicely with
ConstraintLayout as it causes constraints to be lost, thus insert a
wrapper view to keep the constraints intact.

Fixes openhab#3773

Signed-off-by: Danny Baumann <dannybaumann@web.de>

mobile/src/main/res/layout/widgetlist_sectionswitchitem.xml

@@ -6,16 +6,23 @@
     android:layout_width="match_parent"
     android:layout_height="wrap_content">
 
-    <org.openhab.habdroid.ui.widget.WidgetImageView
-        android:id="@+id/widgeticon"
+    <FrameLayout
+        android:id="@+id/widgeticon_container"
         android:layout_width="@dimen/widgetlist_icon_size"
         android:layout_height="@dimen/widgetlist_icon_size"
-        app:imageScalingType="scaleToFit"
         app:layout_constraintEnd_toStartOf="@+id/widgetlabel"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent"
-        app:layout_constraintBottom_toBottomOf="parent"
-        tools:src="@drawable/ic_openhab_appicon_24dp" />
+        app:layout_constraintBottom_toBottomOf="parent">
+
+        <org.openhab.habdroid.ui.widget.WidgetImageView
+            android:id="@+id/widgeticon"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            app:imageScalingType="scaleToFit"
+            tools:src="@drawable/ic_openhab_appicon_24dp" />
+
+    </FrameLayout>
 
     <TextView
         android:id="@+id/widgetlabel"
@@ -28,7 +35,7 @@
         android:maxLines="1"
         android:textAppearance="?attr/textAppearanceBodyLarge"
         android:textDirection="locale"
-        app:layout_constraintStart_toEndOf="@id/widgeticon"
+        app:layout_constraintStart_toEndOf="@id/widgeticon_container"
         app:layout_constraintTop_toTopOf="parent"
         tools:text="Widget label" />
 
@@ -59,7 +66,7 @@
         android:layout_marginStart="16dp"
         android:layout_marginTop="4dp"
         app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toEndOf="@id/widgeticon"
+        app:layout_constraintStart_toEndOf="@id/widgeticon_container"
         app:layout_constraintTop_toBottomOf="@id/labelbarrier"
         app:singleSelection="true">