Add new icons.

Signed-off-by: Ivan Sein <ivan@nextcloud.com>

VideoCalls/Images.xcassets/call.imageset/Contents.json

@@ -2,15 +2,17 @@
   "images" : [
     {
       "idiom" : "universal",
+      "filename" : "videocall.png",
       "scale" : "1x"
     },
     {
       "idiom" : "universal",
-      "filename" : "Call_black.png",
+      "filename" : "videocall@2x.png",
       "scale" : "2x"
     },
     {
       "idiom" : "universal",
+      "filename" : "videocall@3x.png",
       "scale" : "3x"
     }
   ],

VideoCalls/Images.xcassets/contact.imageset/Contents.json

@@ -2,15 +2,17 @@
   "images" : [
     {
       "idiom" : "universal",
+      "filename" : "contacts.png",
       "scale" : "1x"
     },
     {
       "idiom" : "universal",
-      "filename" : "contacts_black@2x.png",
+      "filename" : "contacts@2x.png",
       "scale" : "2x"
     },
     {
       "idiom" : "universal",
+      "filename" : "contacts@3x.png",
       "scale" : "3x"
     }
   ],

VideoCalls/Images.xcassets/launchscreen.imageset/Contents.json

@@ -0,0 +1,23 @@
+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "filename" : "launchscreen.png",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "launchscreen@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "launchscreen@3x.png",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}