fix(firebase-x): setConfigSettings function input parameters aligned with firebase-x plugin

[turanofff]

Function setConfigSettings was using incorrect input arguments settings: any wheres firebase-x cordova plugin doc specifies correct arguments:

Parameters:

• {integer} fetchTimeout - fetch timeout in seconds.
  • Default is 60 seconds.
  • Specify as null value to omit setting this value.
• {integer} minimumFetchInterval - minimum fetch inteval in seconds.
  • Default is 12 hours.
  • Specify as null value to omit setting this value.
  • Set to 0 to disable minimum interval entirely (DO NOT do this in production)
• {function} success - callback function to be call on successfully setting the remote config settings
• {function} error - callback function which will be passed a {string} error message as an argument