Revert "Add tests for start singleTop/singleInstance activity fo..."

Revert submission 10112771-single-for-result

Reason for revert: b/149877125
Reverted Changes:
I923a0d9aa:Avoid creating new instance on top when started fo...
I7d47580f8:Add tests for start singleTop/singleInstance activ...
Bug: 149877125

Change-Id: Ie4490b0a154c58da86b2944993a4ee6380c59c37
(cherry picked from commit a94f639d39f9e94a3388c2ff67191eef8fa569dd)
(cherry picked from commit def8e9a44b20856a44648236fc8f89ee0474dbc6)
7 files changed