Add some more typing characteristics and services

[bdraco]

will conflict with #462 so it should merge first

[codecov]

Codecov Report

Merging #463 (34f1104) into dev (f95cd15) will increase coverage by 0.11%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##              dev     #463      +/-   ##
==========================================
+ Coverage   92.36%   92.48%   +0.11%     
==========================================
  Files          20       20              
  Lines        2228     2223       -5     
  Branches      278      274       -4     
==========================================
- Hits         2058     2056       -2     
+ Misses        124      123       -1     
+ Partials       46       44       -2     

Files	Coverage Δ
pyhap/accessory.py	97.33% <100.00%> (+0.62%)	⬆️
pyhap/characteristic.py	100.00% <100.00%> (ø)
pyhap/hap_crypto.py	100.00% <100.00%> (ø)
pyhap/hap_handler.py	86.64% <100.00%> (+0.36%)	⬆️
pyhap/service.py	100.00% <100.00%> (ø)
pyhap/util.py	92.68% <100.00%> (ø)