Android : Removing code duplication in an identical public methods of 2 not related classes

I have 2 different classes which contain considerable number of the same public methods.

public class HorizontalPackageSelector extends HorizontalScrollView {

    // skipped

    public void method1() {
        doSomething1();
        doSomething2();
    }

}

and

public class VerticalPackageSelector extends ScrollView {

    // skipped

    public void method1() {
        doSomething1();
        doSomething2();
    }

}

And several other methods (about 200 lines in both classes).

I see only one way to avoid duplication:

public class PackageSelectorHelper {

    // skipped

    public void method1() {
        doSomething1();
        doSomething2();
    }

}

public class HorizontalPackageSelector extends HorizontalScrollView {

    private final PackageSelectorHelper helper = new PackageSelectorHelper(this);

    // skipped

    public void method1() {
        helper.method1();
    }

}

public class VerticalPackageSelector extends ScrollView {

    private final PackageSelectorHelper helper = new PackageSelectorHelper(this);

    // skipped

    public void method1() {
        helper.method1();
    }

}

But this is not easy to do if a number of identical methods is too big.