function currentActivity() {
    return this.requestHandler.create('/session/:sessionId/appium/device/current_activity');
}
Receive the current activity on an Android device.

<example>
    :rotateAsync.js
    it('should get the activity of the android device', function () {
        var activity = browser.currentActivity()
        console.log(activity); // returns android activity information
    });
</example>

@see https://github.com/appium/appium-android-driver/blob/master/lib/commands/general.js#L59-L61
@type mobile
@for android