Add scrollbar to Nextcloud login dialog (#6838)

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

@@ -1,6 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
-<LinearLayout
+<ScrollView
     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:padding="16dp"
@@ -67,3 +71,5 @@
             android:text="@string/proceed_to_login_butLabel" />
 
     </LinearLayout>
+
+</ScrollView>