Prevent crash

app/src/main/java/eu/faircode/email/FragmentOptionsPrivacy.java

@@ -211,6 +211,7 @@ public class FragmentOptionsPrivacy extends FragmentBase implements SharedPrefer
                 Helper.authenticate(getActivity(), biometrics, new Runnable() {
                     @Override
                     public void run() {
+                        try {
                             boolean pro = ActivityBilling.isPro(getContext());
                             if (pro) {
                                 prefs.edit().putBoolean("biometrics", !biometrics).apply();
@@ -219,6 +220,9 @@ public class FragmentOptionsPrivacy extends FragmentBase implements SharedPrefer
                                         : R.string.title_setup_biometrics_enable);
                             } else
                                 startActivity(new Intent(getContext(), ActivityBilling.class));
+                        } catch (Throwable ex) {
+                            Log.w(ex);
+                        }
                     }
                 }, new Runnable() {
                     @Override