tree 15dc950453455b672968ed66d4257e1c90302aae
parent 7d4312596428e2a629da73f5a5524a6eda9da8db
author Arc Wang <arcwang@google.com> 1560909677 +0800
committer Arc Wang <arcwang@google.com> 1560909677 +0800

[Wi-Fi DPP] Wi-Fi QR code scanner is not working after a connection fail

After a user uses Wi-Fi QR code scanner to scan a QR code of an unreachable
Wi-Fi network, the scanner does not recognize any QR code until the scanner is
restarted or back from a screen off state.

To restart QrCamera after a Wi-Fi QR code recognition, we should stop it before
start, otherwise the DecodeTask will not work.

Bug: 135225856
Test: Scan a Wi-Fi QR code of unreachable Wi-Fi network and
      scan a Wi-Fi QR code of reachable Wi-Fi network, check
      if the scanner recognizes QR code.

Change-Id: I0063c867d8e4046f184d02134bda842887c003a1