chore(A11yFeedback): Removing Legacy Android M Menu Behavior

Removed legacy code that suppressed search and help menus for
accessibility features. This workaround was implemented in Android M
(ag/10438579) and is no longer needed.

Bug: 393980229
Test: Manual testing on Pixel and non-Pixel devices
Flag: EXEMPT cleanup
Change-Id: Ide4978bb5d2fdacad48399fb8525c6a0dfcd4277