use different avatar sizes for landscape/portrait for call notification

while always fetch the larger version (portrait size)

app/src/main/java/com/nextcloud/talk/controllers/CallNotificationController.java

@@ -266,7 +266,7 @@ public class CallNotificationController extends BaseController {
 
     private void loadAvatar() {
         int avatarSize = Math.round(NextcloudTalkApplication
-                .getSharedApplication().getResources().getDimension(R.dimen.avatar_size_very_big));
+                .getSharedApplication().getResources().getDimension(R.dimen.avatar_fetching_size_very_big));
 
         switch (currentRoom.getType()) {
             case ROOM_TYPE_ONE_TO_ONE_CALL:

app/src/main/res/values-land/dimens.xml

@@ -5,4 +5,6 @@
 
     <dimen name="display_target_image_size">120dp</dimen>
     <dimen name="display_target_image_margin">16dp</dimen>
+
+    <dimen name="avatar_size_very_big">120dp</dimen>
 </resources>

app/src/main/res/values/dimens.xml

@@ -16,7 +16,8 @@
     <dimen name="margin_between_elements">8dp</dimen>
     <dimen name="avatar_size">40dp</dimen>
     <dimen name="avatar_size_big">80dp</dimen>
-    <dimen name="avatar_size_very_big">120dp</dimen>
+    <dimen name="avatar_size_very_big">@dimen/avatar_fetching_size_very_big</dimen>
+    <dimen name="avatar_fetching_size_very_big">140dp</dimen>
     <dimen name="avatar_corner_radius">20dp</dimen>
 
     <dimen name="chat_text_size">14sp</dimen>