Add support for Mocreo ST7 temperature sensor

[bbyrd74]

No description provided.

[bbyrd74]

Argh ok im a n00b...

Note: During testing I discovered that Mocreo ST7 devices broadcast with
service_class_uuid16 = 0xF0FF. This means the ST7 check in init.py
currently at line 518 needs to be placed before the generic 0xF0FF block
currently at line 491 to prevent ST7 from being incorrectly filtered by the
Thermobeacon/Inkbird checks.

The current PR has the check at line 518, which works when placed before
the 0xF0FF block. Let me know if you'd like me to move it or if you'd
prefer to handle the placement during merge.

[Ernst79]

No problem, please create a new PR with a fix for this and it should be all fine.