Tilt (rainbow) Hat Android Things (that) - A Tilt Hydrometer monitor.

TODO:

• Document and format this MD :-) v Real Tilt integration - for now it only takes dumpsys commands
• Use 2nd touch on Button C to start / stop timer
• Post results to Google Drive
• Use rainbow to display OG -> FG progress.
• Real activity to display data when plugged to HDMI:
  • IP address
  • Temperature (C / F)
  • Gravity
  • Timer
• Companion Android App
  • Sets parameters
  • Sync measured values
  • Calibration
• Figure out how to grant BT permissions automatically, without: adb shell pm grant net.felipeal.that android.permission.ACCESS_COARSE_LOCATION or adb shell pm grant net.felipeal.that android.permission.ACCESS_FINE_LOCATION
• Add dumpsys commands to:
  • change scan frequency
  • start scan
  • stop scan
  • change Tilt color
• Support multiple Tilts
• Add options to calibrate gravity and/or temperature