wificond: Handle NL80211_CMD_CH_SWITCH_NOTIFY

Add support to handle NL80211_CMD_CH_SWITCH_NOTIFY
mainly to update association frequency.

Bug: 155941506
Bug: 156588935
Test: Manual-Verified that channel is updated upon handling CSA.
Test: system/connectivity/wificond/runtests.sh

Signed-off-by: Purushottam Kushwaha <quic_pkushwah@quicinc.com>
Change-Id: I239c9e6ea0a082a909f9fe9caa007784ffab9112
3 files changed