Handle multiple network request configs in WifiPickerTracker

WifiPickerTracker should not assume only one network request config will
be returned in getPrivilegedConfiguredNetworks, and should be able to
handle multiple configs and choose the right one to use for the
connected request.

Bug: 190643583
Test: atest WifiPickerTrackerTest, manual verification via adb shell cmd
wifi add-request for multiple networks

Change-Id: I894068a6c5c511b9adbf5c6a26cc58e035fd97d5
2 files changed