commit 1988fb75c669cae4a4dff61356e3b1469c4eefef
author Arc Wang <arcwang@google.com> Thu Dec 27 13:54:15 2018 +0800
committer Arc Wang <arcwang@google.com> Wed Jan 02 07:12:15 2019 +0000
tree 205a3891eeabf7d13c4bb2018bde5232beec0cd1
parent cc8212edf6542e078f24a542c14630b2302f72f8

Implement Wi-Fi QR code scanner flow.

1. Implements WifiNetworkConfig Wi-Fi connection method
2. Shows error message when the QR code is not valid and hides it after 2s
3. In configurator mode, launchs AddDeviceFragment for a valid QR code
4. In enrollee mode, connects Wi-Fi for a valid QR code

Bug: 118794978
Test: manual test
      atest WifiQrCodetest
      atest WifiDppConfiguratorActivityTest
      atest WifiDppEnrolleeActivityTest
      atest WifiDppQrCodeScannerFragmentTest

Change-Id: Ie4731b22df295c60906156d33ea28dad9c084ce4