Revert "Pass down whether iterating through tasks in overview is..."

Revert submission 20956764-alt_tab_forward

Reason for revert: Actually we dont need these changes after all. SHIFT doesn't matter in the initial tab to overview. The subsequent tabs are handled by RecentsView and we already have a check on shift

Reverted changes: /q/submissionid:20956764-alt_tab_forward

Change-Id: Iaf62d47b239a680c84df2f226fd36484a36b84dd