Copied from internal bug b/242473326

IIUC, MediaQuery.of(context).accessibleNavigation should return true when accessible navigation is turned on. However, this is currently returning false when Android Voice Access is on, making it unable to detect the status of Voice Access.

This should be easily reproducible by checking the value of MediaQuery.of(context).accessibleNavigation when Voice Access is turned on.

A minimum reproduce: https://github.com/liumcse/bug_voice_access_repo