Update documentation for AES-GCM-ESP keymat length

Added notes that keymat length must include 32 bits of salt.

Bug: 68672051
Test: Frameworks-net unit tests & IpSecManager CTS tests run
Change-Id: I0ae0c5be8a45b2374783b3bd1fa8bf930f15e687
1 file changed
tree: eee97a13fd5cebc8c0db65a99a35ed4966b32e72
  1. core/
  2. services/
  3. wifi/