Add Garmin Health SDK Driver

[kalynstricklin]

Add support for Garmin Wearable Health Sensors

• Pair Garmin using scan flow from SDK
• Add SDK License Key for Garmin in pref_sensors.xml

Outputs:

• HeartRateOutput
• StressOutput
• RespirationOutput
• AccelerometerOutput
• SpO2Output
• BodyBatteryOutput
• StepsOutput
• CaloriesOutput
• BodyTemperatureOutput

[kalynstricklin]

waiting on the license key