Update the dialog content for accessibility floating menu

Accessibility gesture is replaced by accessibility floating menu, related content in edit shortcut dialog and tutorial dialog are updated in this changelist.

cherry picked from commit 5fe2cdcf

Bug: 173990914
Test: manual test
Change-Id: Ie529fa8a1f8ee87ca1ec5611b35675cdfd762165
Merged-In: Ie529fa8a1f8ee87ca1ec5611b35675cdfd762165