For gs101 devices, we must detect whether a wireless charger exists at
runtime, otherwise we'd need to create separate Health.cpp for each
product in order to instantiate the wireless path correctly.
Test: Ensure battery defender triggers via wireless connection.
Ensure there are no warnings for devices that do not have a wireless
charger
Bug: 165954398
Change-Id: Ibba202293141c017d3048980b643a80b5fb57ca4