Remove the accessibility gesture tutorial dialog in system navigation

Accessibility gesture is replaced by the accessibility floating menu, remove the accessibility gesture tutorial dialog when choosing to use gesture navigation mode.

cherry picked from commit 1a0e2b1b

Bug: 173990914
Test: manual test
Change-Id: Iae5297747594fcc73fc9bc14537c8fdecb86b660
Merged-In: Iae5297747594fcc73fc9bc14537c8fdecb86b660