Split Gatt interface into GattConnection and GattIo

[twyatt]

No description provided.

[codecov]

Codecov Report

Merging #59 into develop will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             develop      #59   +/-   ##
==========================================
  Coverage      78.62%   78.62%           
  Complexity        35       35           
==========================================
  Files             12       13    +1     
  Lines            248      248           
  Branches          27       27           
==========================================
  Hits             195      195           
  Misses            45       45           
  Partials           8        8           

Impacted Files	Coverage Δ	Complexity Δ
core/src/main/java/gatt/GattConnection.kt	100.00% <100.00%> (ø)	0.00 <0.00> (?)
core/src/main/java/gatt/GattIo.kt	100.00% <100.00%> (ø)	0.00 <0.00> (?)
processor/src/main/java/GattProcessor.kt	100.00% <100.00%> (ø)	4.00 <0.00> (ø)
throw/src/main/java/GattOrThrow.kt	86.66% <100.00%> (ø)	0.00 <0.00> (ø)