DfuServiceController
A controller class allows you to pause, resume or abort the DFU operation in a easy way.
Keep in mind that there may be only one DFU operation at a time, and other instances of a DfuServiceController (for example obtained with a previous DFU) will work for all DFU processes, but the isPaused and isAborted methods may report incorrect values.
Added in DFU Library version 1.0.2.