Fix screen should not automatically leave one-handed mode
when the TalkBack user is exploring

Use AccessibilityStateChangeListener to listening
Accessibility state changes then align One-Handed timeout
with A11y's timeout settings.

Bug: 170360730

Test: manual
Test: atest WMShellUnitTests
Change-Id: Ie0debd157a170388e10ce7508316111697922f78
1 file changed