Investigate Barista implementation of assertions and certain view actions

[Zhuinden]

Barista has existed since 29 Dec 2016 and therefore might have solved some issues that aren't evident via direct usage of Espresso.

It should be investigated whether we can use Barista internally to execute view actions and assertions, instead of cutting together stuff from Kakao and other samples online.

[Zhuinden]

Also https://github.com/AzimoLabs/CustomScrollActions/blob/bfe052c518fdfd35cdcf2e49131cb7aaa7c0a653/app/src/androidTest/java/customscrollactions/azimolabs/com/customscrollactions/utils/CustomScrollActions.java