Bug: 152462657
Test: Manual. Enable TalkBack in Settings > Accessibility. Navigate to
Developer options > Wireless debugging > Pairing device with QR code.
Scan a valid QR code, which should change to "Pairing device..." and
screen reader should say "Pairing device".
Change-Id: If467b56f787bda765fce1e5d46f8ab3c6210dc76
(cherry picked from commit 07ad841e2d)
Exempt-From-Owner-Approval: cherry-pick
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 6178918653)
Exempt-From-Owner-Approval: cherry-pick