[android] Pass the entire link to the backend, so newer version have a chance to arrive

briar-android/src/main/java/org/briarproject/briar/android/contact/add/remote/LinkExchangeFragment.java

@@ -146,7 +146,7 @@ public class LinkExchangeFragment extends BaseFragment {
 				return null;
 			}
 			linkInputLayout.setError(null);
-			return linkWithoutSchema;
+			return link.toString();
 		}
 		linkInputLayout.setError(getString(R.string.invalid_link));
 		linkInput.requestFocus();