1

MainActivity.java

public class MyApplication extends Application {

    @Nullable
    private AccountComponent accountComponent;

    @NonNull
    public AccountComponent getAccountComponent(String account) { // конкретный аккаунт
        if (accountComponent == null) {
            accountComponent = Dagger.... // init
        }
        return accountComponent;
    }

    public void resetAccountComponent() {
        accountComponent = null;
    }

}