Fix bluetooth applet can't show device list

tower: https://tower.im/projects/8f19f0bf0e754f0b82ef2c24bc230973/todos/eba8e4c08fce434d9ab9ffa03cf702e0/

Change-Id: Ifeb8e58d50df5d32a6f85c16ef4461dac6d50d62
Merge "Fix bluetooth applet can't show device list"