Initial commit of contrib Ride Logger for Android

Logs rides to json files in Documents/Rides
Supports Ant and most internal sensors on Android:
Power, Heart Rate, GPS, Pressure, Temp, Acceleration...
Merge pull request #1144 from amtriathlon/master

Added Polarized Zones to HR and Speed histograms
Merge pull request #1142 from chet0xhenry/master

Add a Ride Logger App for Android
Fix merge resampling rounding

.. I know its a lazy method but at least use the right
   numeric format. LOL. What a twit.
Syncronize writes to build valid json
Clean up white space
Merge pull request #1145 from chet0xhenry/master

Synchronize Writes to JSON file in Ride Logger
Fix CyclingAnalytics upload

.. bit of a hacky fix, but practical enough.
Added pace to tooltip for speed histogram
Except when we know the activity is not a Run