Cleanup of code from Android Studio’s “Inspect Code” and “Code Cleanup” tools.

...om/google/zxing/integration/android/IntentIntegrator.java

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

.../info/nightscout/android/medtronic/ManageCNLActivity.java

...ightscout/android/medtronic/message/BeginEHSMMessage.java

...oid/medtronic/message/ChannelNegotiateRequestMessage.java

...roid/medtronic/message/CloseConnectionRequestMessage.java

...oid/medtronic/message/CloseConnectionResponseMessage.java

...roid/medtronic/message/ContourNextLinkCommandMessage.java

...out/android/medtronic/message/ContourNextLinkMessage.java

...roid/medtronic/message/ContourNextLinkRequestMessage.java

...oid/medtronic/message/ContourNextLinkResponseMessage.java

.../nightscout/android/medtronic/message/EndEHSMMessage.java

...fo/nightscout/android/medtronic/message/MessageUtils.java

...droid/medtronic/message/OpenConnectionRequestMessage.java

...roid/medtronic/message/OpenConnectionResponseMessage.java

...oid/medtronic/message/PumpBasalPatternRequestMessage.java

.../android/medtronic/message/PumpStatusResponseMessage.java

...roid/medtronic/message/ReadHistoryInfoRequestMessage.java

...out/android/medtronic/message/ReadInfoRequestMessage.java

...droid/medtronic/message/RequestLinkKeyRequestMessage.java