Revert "Fix delayed offload session start issue"

This reverts commit a97c77f2.

Reason for revert: This is causing some widespread problems at the moment - seeing that frames are not being pushed as expected when offloading is starting, reverting this CL helps.

Bug: 357025044
Change-Id: I408f8382a3e10b32bf9afec63532a39f29f90190