Reland "Add a functional test for no-desktop-task-limit"

This reverts commit aaa17a0071ba3e61c2f8283a8d68941684f1045a.

Reason for revert: reland after fixing the compat issue with ag/30336343

Change-Id: Ief255f9d56dd091861818dffd81d2a3618ca9c13
2 files changed