Expose ScanResult constructor for SettingsLibRoboTests

Expose ScanResult default constructor so that
SettingsLibRoboTests can construct a ScanResult
object in the desired state and parcel/unparcel it.

Bug: 138801922
Test: make RunSettingsLibRoboTests -j40
Change-Id: Ie57e0e20b1a9d9269d99cc020c3b259b39a35592
2 files changed