Fix RecentsView scroll linking

- Reverts change from ag/11900651 that deferred setting
  mRecentsViewScrollLinked = true
- Instead, setCurrentPage(mCurrentPage) after updating layout rotation
  to ensure we recompute page scrolls before using them

Test:
- Auto rotate on, home rotation off, open Calculator in landscape,
  swipe up slowly and ensure it never turns invisible
- Quick switch from Calculator to Clock, start swiping directly up
  immediately after settling on Clock, ensure Calculator window
  remains at its scroll position to the side (b/159461591)

Fixes: 159461591
Change-Id: Iab92963cc6c33df42b77f5ccfa3932382e8f869a