Applies Accessibility UI timeout for showing duration of magnification button

Users can change Time to take action (Accessibility timeout) settings
to make the magnification button showing duration aligned with
recommended a11y UI timeout.
Settings Page: Settings > Accessibility settings > Time to take action.
Demo video: b/167977099#comment2

Bug: 167977099
Test: atest MagnificationModeSwitchTest
Change-Id: I428b9d8221854edc476fcd455f3b9114b6b97ae9