Add directional accessibility page actions to PagedView

For PagedView, when isPageOrderFlipped is true, it means the LTR mode is
flipped. For the "recents" in launcher, isPageOrderFlipped is true.
However, this doesn't affect the directional page operations since
scrollLeft()/Right() already has correct Rtl considerations. See
b/78788182 for more information on the LTR mode.

Test: Tested with the "recents" in launcher. Verified that page left
action always move pages to the right (so that the next page from the
left side shows), and page right actions always move pages to the left
(so that the next page from the right side shows). Also tested with the
home screen 1/2, 2/2 paging.
Bug: 136277517

Change-Id: I965d651c37d258eaa8ea347d1ad6f698f9b590bf