Remove hardcoded string

app/src/main/java/org/schabi/newpipe/util/StreamDialogEntry.java

@@ -52,7 +52,7 @@ public enum StreamDialogEntry {
                                 item.getUploaderName());
                     }, throwable -> Toast.makeText(
                             fragment.getContext(),
-                            "Error at Show Channel Details",
+                            R.string.error_show_channel_details,
                             Toast.LENGTH_SHORT
                     ).show());
         } else {

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

@@ -755,4 +755,5 @@
     <string name="tablet_mode_title">Tablet mode</string>
     <string name="on">On</string>
     <string name="off">Off</string>
+    <string name="error_show_channel_details">Error at Show Channel Details</string>
 </resources>