584dc6b8b9
There are two main changes in this CL:
(1) Add user selection preference support. If user
explicitly chooses a network, framework will remember
it and consider user has a higher preference of this
network over all other visible networks.
(2) Seperate user set BSSID and framework chosen BSSID.
The BSSID under WifiConfiguration is set by user and is
not allowed to be overrided. The BSSID under Network
selection status is the best BSSID chosen by the
framework to associate with.
BUG=26012244
BUG=26721725
Change-Id: Iece91d20b139ef1c6aec05828c734d1706d81007