Transit to exploration state after gesture isn't recognized

When gesture detection fails, TouchExplorer will try to transit to
exploration state once user is still touching the screen. However,
it resets the state right after it tries to transit to exploration
state currently.

Bug: 118724767
Test: A11y CTS & unit test
Change-Id: Ifcf931233da7cfcaf5b6c608bcd1c26e3a7a904a