Fix slicing config processing logic

Check whether the app ID matches in the traffic descritpor and check the
slicing config from the corresponding route selection descriptors
insted of from the slicing config directly.
Add EMBB as a valid SST for PRIORITIZE_LATENCY as well.

Test: atest SlicePurchaseControllerTest
Bug: 289799534
Change-Id: I1927fed5ac34678b7b7ccca50c7896a8b7234a76
2 files changed