Add new open root tests using espresso

This test uses `androidx.test.espresso.contrib.RecyclerViewActions`.
Including this dependency causes resource conflict issues in indirect
dependencies that are present in both DocumentsUI and DocumentsUITests.
Here we've fixed it by using jarjar to remove duplicate classes from the
test apk. b/437010833 tracks a long term solution.

Bug: 436118913
Flag: EXEMPT updating tests
Test: updating tests

Change-Id: Icced9c1c98d6285ceb543f9406f6a4c45428e2d3