Prevent importing biometrics without available sensor

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

@@ -881,7 +881,13 @@ public class ActivitySetup extends ActivityBase implements FragmentManager.OnBac
                     for (int s = 0; s < jsettings.length(); s++) {
                         JSONObject jsetting = (JSONObject) jsettings.get(s);
                         String key = jsetting.getString("key");
-                        if (!"pro".equals(key) || BuildConfig.DEBUG) {
+
+                        if ("pro".equals(key) && !BuildConfig.DEBUG)
+                            continue;
+
+                        if ("biometrics".equals(key) && !Helper.canAuthenticate(context))
+                            continue;
+
                         Object value = jsetting.get("value");
                         if (value instanceof Boolean)
                             editor.putBoolean(key, (Boolean) value);
@@ -893,9 +899,9 @@ public class ActivitySetup extends ActivityBase implements FragmentManager.OnBac
                             editor.putString(key, (String) value);
                         else
                             throw new IllegalArgumentException("Unknown settings type key=" + key);
+
                         Log.i("Imported setting=" + key);
                     }
-                    }
                     editor.apply();
                     ApplicationEx.upgrade(context);