Fix hide fragment transition

Bug 30699392

During optimized hide operations with fragment transitions, the
hidden fragment View should not be GONE, but instead be visible
and the exiting views should be made INVISIBLE. After the
transition completes, the fragment's view should be GONE.

Test: I189fb22883637888516fb04940dbb288cb9a49d2
Change-Id: I3a80fdaa198ed04916df02b1d2ca069e6992f88f