message: feat: Make userId optional in the Android code.
diff: @@ -176,10 +176,8 @@ public class RNSentryModule extends ReactContextBaseJavaModule {
  public void setUser(ReadableMap user) {
  UserBuilder userBuilder = getUserBuilder(user);
  User builtUser = userBuilder.build();
  - if (builtUser.getId() != null) {
  Sentry.setUser(builtUser);
  }
  - }
  @ReactMethod
  public void crash() {
  @@ -229,7 +227,6 @@ public class RNSentryModule extends ReactContextBaseJavaModule {
  if (event.hasKey("user")) {
  UserBuilder userBuilder = getUserBuilder(event.getMap("user"));
  User builtUser = userBuilder.build();
  - if (builtUser.getId() != null) {
  UserInterface userInterface = new UserInterface(
  builtUser.getId(),
  builtUser.getUsername(),
  @@ -239,7 +236,6 @@ public class RNSentryModule extends ReactContextBaseJavaModule {
  );
  eventBuilder.withSentryInterface(userInterface);
  }
  - }
  if (castEvent.hasKey("extra")) {
  for (Map.Entry<String, Object> entry : castEvent.getMap("extra").toHashMap().entrySet()) {
  