Use same logo size for

- account setup
- what's new screen
- splash screen

Signed-off-by: tobiasKaminsky <tobias@kaminsky.me>

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

@@ -26,8 +26,8 @@
 
         <ImageView
             android:id="@+id/thumbnail"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
+            android:layout_width="@dimen/splash_image_size"
+            android:layout_height="@dimen/splash_image_size"
             android:layout_marginBottom="@dimen/standard_padding"
             android:contentDescription="@string/app_name"
             android:src="@drawable/logo" />

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

@@ -15,7 +15,7 @@
 
     <ImageView
         android:id="@+id/whatsNewImage"
-        android:layout_width="200dp"
+        android:layout_width="@dimen/splash_image_size"
         android:layout_height="0dp"
         android:layout_gravity="center_horizontal"
         android:layout_marginBottom="@dimen/alternate_margin"