This method helps in encoding of Service Tables in EF.SST, EF.UST, EF.EST, EF.IST. Takes original hex string of EF.SST, EF.UST, EF.EST, EF.IST, Service number, Service to be enabled or disable flag as input and outputs the modified Service Table. Change-Id: I0c97317d5a17aa0df720659d021b5cbf7d30edcc