Removed placeholder prefix

Author: litetex

app/src/main/java/org/schabi/newpipe/settings/services/instances/AbstractServiceInstanceListFragment.java

@@ -362,7 +362,7 @@ protected int getIconForInstance(final I instance) {
                 .filter(c -> c.createdClass().isInstance(instance))
                 .map(InstanceTypeCreator::icon)
                 .findFirst()
-                .orElse(R.drawable.ic_placeholder_circle);
+                .orElse(R.drawable.ic_circle);
     }
 
     /*//////////////////////////////////////////////////////////////////////////

app/src/main/java/org/schabi/newpipe/util/services/ServiceHelper.java

@@ -30,15 +30,15 @@ public static int getIcon(final int serviceId) {
             case 0:
                 return R.drawable.ic_smart_display;
             case 1:
-                return R.drawable.ic_placeholder_cloud;
+                return R.drawable.ic_cloud;
             case 2:
                 return R.drawable.ic_placeholder_media_ccc;
             case 3:
                 return R.drawable.ic_placeholder_peertube;
             case 4:
                 return R.drawable.ic_placeholder_bandcamp;
             default:
-                return R.drawable.ic_placeholder_circle;
+                return R.drawable.ic_circle;
         }
     }