Flutter plugin implementing OTA update
On Android it downloads the file (with progress reporting) and triggers app installation intent.
On iOS it opens safari with specified ipa url. (not yet functioning)
EXCEPTION FOR QUICK IDENTIFICATION OF ERRORS THROWN FROM THIS PLUGIN.
THIS IS USED CURRENTLY ONLY FOR INPUT PARAMETER VERIFICATION ERRORS. IF THERE IS PROBLEM WITH
DOWNLOADING THE FILE OR RUNNING UPDATE OtaEvent WITH ONE OF THE _ERROR STATUSES IS USED
