Update FakeUid with new methods

BatterystatsImpl has new methods for background accounting for Wifi and
Bluetooth scanning. These methods are added to FakeUid.java here.

Bug: 35679958
Bug: 35677312
Bug: 35673525
Test: see ag/2010580
Change-Id: I706f28ba8faaf89e9fde25814e9c583c4731d3de