Add visibility control to ADB QR code preference.

The preference should be hidden if isAdbWifiQrSupported() is false.

Bug: 150163684
Bug: 149843499

Test: make RunSettingsRoboTests ROBOTEST_FILTER=AdbQrCodePreferenceControllerTest
Change-Id: I3e833440fb1a6f369ac97cec8db04f2b99dd4640
(cherry picked from commit 61789186)
Exempt-From-Owner-Approval: cherry-pick