Shouldn't turn on other accessibility features in SuW.

Root Cause:
During the SuW, user could turn on other accessibility features except for Magnification, Select to Speak, and Talkback through edit shortcut menu list.

Solution:
Hide the edit shortcuts button if in the SuW period to avoid to turn on others.

Bug: 158046037
Test: manual test
Change-Id: I06e5fde2320c0736ecaf9feb912349c5965cb491