Clean up and workaround for tests involving WorkManager triggering


nits

Robolectric 4.2 doesn't work properly on Windows: glean tests now
fail with weird ResourceNotFound errors. This is due to some issues
in how paths are handled on Windows in the latest Robolectric.

It's erroring out.

It's dead

They've gone bankrupt and no longer offer a store online; the current site is a placeholder

Server is erroring out

They've shut down

This reverts commit dcd702ca.

Create the function `observeIdOrSelected` to start observing changes based on
the given `sessionId`. If the session does not exist, then observe the
selected session.

Closes: #1940

Looks like a dead website

According to [NewsGuard](https://api.newsguardtech.com/6E0FA7E2CF73DA94AB47BB2FCA2F31FEADEFDA6504DAB9BD10FE6EE11958D35751CF3DEEA2E6D8F66DFE9688C3562CB8EF46C880D400F511?cid=6437f3cb-6332-46e6-9000-309663a9e9c8):

>has published misleading headlines, debunked conspiracy theories, and poorly vetted content.

It was seized by the US government due to soliciting child prostitution.

>The Justice Department today announced the seizure of Backpage.com, the Internet’s leading forum for prostitution ads, including ads depicting the prostitution of children. 

–https://www.justice.gov/opa/pr/justice-department-leads-effort-seize-backpagecom-internet-s-leading-forum-prostitution-ads

The current events API requires parameters that
are not used so often. The new API allows to
record events with no parameters and optionally
allows to use the `extra` key-value map for all
the other use cases.

control group.