Make Widget implement WebElement

Description

Since Widget does not implement WebElement along with WrapsElement, it makes calls to the WebElement methods require a verbose call to getWrappedElement every time an interaction is needed. It would be a simple fix to have Widget implement this interface and delegate to the underlying element.

Environment

n/a

Details

I tried to extend Widget and implement WebElement in the subclass, but there's a type-erasure issue because of the implementation of findElement(By By)

Code To Reproduce Issue [ Good To Have ]

public Class MyWidget extends Widget implements WebElement {
    // WebElement interface requires a generic here, but Widget does not
    @Override
    public <T extends WebElement> T findElement(By by) {
        return element.findElement(by);
    }
}

Ecxeption stacktraces

Error:(65, 43) java: name clash: findElement(org.openqa.selenium.By) in MyWidget and findElement(org.openqa.selenium.By) in io.appium.java_client.pagefactory.Widget have the same erasure, yet neither overrides the other

Link to Appium logs

n/a

Start at the Widget entry point, its findElement(By) method, and getWrappedElement; compare their signatures with WebElement and the reproduction shown in the issue. Done means Widget can be used as a WebElement without the reported type-erasure error, with delegated interactions covered by the relevant existing tests.