Wifi usability: Add link probe results and rx link speed into usability

stats

As title indicates.

Bug: 113262380

Test: frameworks/base/wifi/tests/runtests.sh

Change-Id: Idfa70d314f2938ea42a8b308c7d74e274af7c3cb
Signed-off-by: Mingguang Xu <mingguangxu@google.com>