core: MQTT camera not working on 0.87

Home Assistant release with the issue: 0.87

Last working Home Assistant release (if known):

0.86.4

Operating environment (Hass.io/Docker/Windows/etc.):

NUC running ubuntu 18.04 with ha in a virtualenv

Component/platform:

mqtt camera

Description of problem:

Since 0.87 motion snapshot camera from the dafang_hacked Xiaomi Dafang camera no longer works. This is an mqtt camera which is auto discovered thru mqtt discovery. There is an error in homeassistant.log.

2019-02-08 19:29:31 WARNING (MainThread) [homeassistant.components.mqtt] Can't decode payload b'\xff\xd8\xff\xdb\ (long string of similar stuff) \xd9' on myhome/dafang/motion/snapshot with encoding utf-8

Problem-relevant configuration.yaml entries and (fill out even if it seems unimportant):

Traceback (if applicable):

Additional information: