Refine AccessibilityGestureNavigationTutorial button type

Root cause: It is weird to display positive text for the negative button.
Solution: Change to the positive button.

Bug: 216189516
Test: make RunSettingsRoboTests ROBOTEST_FILTER=AccessibilityGestureNavigationTutorialTest
Change-Id: I8ffc6b7b5b510fab159a23af83bca4426f2dc81d
2 files changed