Revert "Revert "Bug 1027144 - Re-enable test_homescreen_move_app.py" for intermittent test failures"

This reverts commit a0807151b0b28feb59b323a30b1f74dc8801be32.
Merge pull request #21126 from KevinGrandon/land_bug_1027144

Revert "Revert "Bug 1027144 - Re-enable test_homescreen_move_app.py" for intermittent test failures"