Adding Bluetooth to moments

[javipacheco]

WIP

• [X] Change the name of WifiServices to ConnectivityServices
• [X] Add new method for getting paired devices by Bluetooth
• [X] New BoradcastReceiver for adding and removing devices connected in shared preferences
• [X] New method for getting the devices connected
• [X] Add test for ConnectivityServices
• [x] New bluetooth field in Moment table in database
• [x] New bluetooth field in Moment JSON in Cloud Storage in Drive
• [x] New space in Edit Moment for adding Bluetooth devices to moment
• [x] New message in dialogs when the wifi or bluetooth are not connected
• [x] Review getBestAvailableMoment in order to show the moment to the user if the new device is connected by Bluetooth

[47degdev]

Current coverage is 32.72% (diff: 40.74%)

Merging #1197 into master will increase coverage by 0.06%

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  Lines         16032      16179   +147   
  Methods       15607      15739   +132   
  Messages          0          0          
  Branches        413        417     +4   
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+ Hits           5235       5294    +59   
- Misses        10797      10885    +88   
  Partials          0          0          

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[javipacheco]

This PR has been reviewed in several PRs against this branch and I'm going to merge with master