Convert bitRate string to float64 with uint Kbps.

GetSMPolicyDnnData returns SMPolicyDnnData derived from SmPolicy data which snssai and dnn match.

Use BitMap to generate requested policy control triggers, 1 means yes, 0 means no, see subscaulse 5.6.3.6-1 in TS29512.

Convert Snssai form models to hexString(sst(2)+sd(6)).