Revert "Remove testFinishActivityWithMoveTaskToBackAfterStop from CTS."

This reverts commit 76c3e8f747bc00fa772193bc82fef70785ce4a2e.

Reason: Original CL wasn't reviewed by test owners.

Bug: 64983646
Test: self
Change-Id: Ie9bc449c068e73b496161fa707cf94d300cde409
1 file changed