add new lines at EOF for checkstyle

Author: thatfiredev

auth/src/main/java/com/firebase/ui/auth/data/remote/SignInKickstarter.java

@@ -258,4 +258,4 @@ private void handleCredential(final SignInCredential credential) {
                     });
         }
     }
-}
+}

auth/src/main/java/com/firebase/ui/auth/ui/email/CheckEmailHandler.java

@@ -105,4 +105,4 @@ public void onActivityResult(int requestCode, int resultCode, @Nullable Intent d
             setResult(Resource.forFailure(e));
         }
     }
-}
+}