Sticky keys should not capture focus

When focus is captured, dialog will be dismissed when user does back gesture.

Fixes: 322781277
Flag: ACONFIG com.android.hardware.input.keyboard_a11y_sticky_keys_flag TRUNKFOOD
Test: trigger sticky keys indicator and do back gesture -> see dialog not dismissed
Change-Id: I242516018af4af07e4654212e0c102861f0043c8
1 file changed