wifi: Add remaining capability flags from legacy HAL

While there,
1. Remove the _SUPPORTED flag from all the capabailities to make it
consistent.
2. Correct the docstring for |create*Iface|.

Bug: 33673826
Test: Compiles
Change-Id: I26f6de3d681dec133b51ba5dd7f21a29c92ea238
3 files changed