WNM Sleep Mode Response frame is used to update GTK/IGTK only if PMF is enabled. Verify that PMF is in use before using this field on station side to avoid accepting unauthenticated key updates. Bug: 25266660 Change-Id: Ib4b80f9c9e4aa5ea0b827c5202809c9660ad9b39 Signed-off-by: Firefly <service@t-firefly.com> Signed-off-by: Firefly <service@t-firefly.com> (cherry picked from commit 1e9857b5f1dd84ac5a0ada0150b1b9c87d44d99d) Signed-off-by: Firefly <service@t-firefly.com>