commit 1b3f570a67be7387ad2e0a36c7695c14c56493b4
author hughchen <hughchen@google.com> Fri Feb 07 17:48:39 2020 +0800
committer hughchen <hughchen@google.com> Mon Feb 10 10:45:51 2020 +0800
tree c4fb2b1b7fde3f6936d0d31e76bfc93f5708aa5a
parent 978b19ec6384dd42e29030d8cfbf892d6dc36bbf

Fix bluetooth settings force close

This CL include following change:

- Add null check of cacedBluetoothDevice, cachedBluetooth could be null
  if the input BluetoothDevice can't found in
  CachedBluetoothDeviceManager.
- Move addPreference() and removePreference() to update() method,
  because update() will be called to update UI when recevice Bluetooth
  device change event.
- Add test case to test CachedBluetoothDevice null check.

Bug: 149068434
Test: make -j42 RunSettingsRoboTests
Change-Id: I90016bf1175925821b0d9b634c62cf796289a734