Upgrade robolectric to version 4.16 (#5923)

* Update dependency org.robolectric:robolectric to v4.16

* Fix file size formatter output on API 26+

* Use more realistic value for maxUploadSize

* Update screenshots

* Fix test issue: "java.security.KeyStoreException: AndroidKeyStore not found"

* Add exceptions.

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Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: ElementBot <android@element.io>

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