[appium] try out some settings when you cannot get expected elements

In some cases, no expected elements are in views via Appium/UIA2 driver. It has some conditions, so it is worth trying out the below settings apis.

• enableMultiWindows
• ignoreUnimportantViews
• allowInvisibleElements

These attributes allow you to find elements via Appium/UIA2 driver. They may not be able to find via uiautomator framework via Android as general way, so you need to interact with them via xpath finding element/s strategy.

https://github.com/appium/appium-uiautomator2-driver