Fix the GAR issue of the Switch Access user can not move.

Root cause:
Not set and export the corresponding Accessibility actions.

Solution:
Exported the four Accessibility actions used to
move the floating menu to the screen corners like a system bubble.

Bug: 178433098
Test: atest AccessibilityFloatingMenuViewTest
Change-Id: Ic2e205a1ed2e8c1ea8794e25835f56444271b9df