Fix part of #1868: Fixed few TopicRevisionFragmentTest for Robolectric

[anandwana001]

Explanation

Fix part of #1868
Fixed few tests in TopicRevisionFragmentTest

Removed one test as it is e2e test which is not able to perform in Robolectric. We do have a way where we are keeping the required test in their particular file only, so the removed test is tested from it's own activity.

Skipping 2 test cases:
testTopicRevisionFragment_loadFragment_configurationChange_checkSpanCount_isThree
testTopicRevisionFragment_loadFragment_selectRevisionTopics_opensRevisionCardActivity

Roboelctric

Checklist

• The PR title starts with "Fix #bugnum: ", followed by a short, clear summary of the changes. (If this PR fixes part of an issue, prefix the title with "Fix part of #bugnum: ...".)
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[rt4914]

LGTM, thanks.