Currently, actions menu button only support an event handler to be
called upon button click. However, when the desired result of a
button click is just a redirection, "href" attributes are preferable,
due to their accessibility support.
To better handle such cases, this patch also adds support for "href"
attributes inside action item buttons. When "href" property exists
for an actions menu item, it is used and the event handler is
ignored.
Bug: T289840
Change-Id: I776680c19564f032acd550206c7d1306407420e0
257112ce78