Root cause: Don't call displayPreference before setChecked called.
Solution: Don't show quick settings tooltips if preference is not ready.
Bug: 237850687
Test: make RunSettingsRoboTests ROBOTEST_FILTER=AccessibilityQuickSettingsPrimarySwitchPreferenceControllerTest
Change-Id: I52425190cce4ab3cf31be025a743bf8b212fa1f9