Remove pre-Realm data object usage and objects themselves

.../java/info/nightscout/android/medtronic/MainActivity.java

...info/nightscout/android/medtronic/MedtronicCNLReader.java

.../android/medtronic/service/MedtronicCnlIntentService.java

...ain/java/info/nightscout/android/upload/DeviceRecord.java

...java/info/nightscout/android/upload/GlucometerRecord.java

...info/nightscout/android/upload/MedtronicNG/CGMRecord.java

...ghtscout/android/upload/MedtronicNG/PumpStatusRecord.java

app/src/main/java/info/nightscout/android/upload/Record.java

...roid/upload/nightscout/NightscoutUploadIntentService.java