Reopened Middle East shipping and plummeting oil prices on Friday boosted bets the Federal Reserve may begin cutting interest rates as soon as December, but its policymakers still face a tangled outlook ahead of their April 28-29 meeting.Iran's announced reopening of the Strait of Hormuz pushed oil below $90 a barrel for the first time in more than five weeks, but U.S. central bank officials will now need to assess how much damage the seven-week conflict has done to underlying price trends…