Turn off some anomaly detectors by default

1. Wakeup alarm detector
   Because we cannot distinguish it between foreground and background
2. Bluetooth unoptimized scanning detector
   There is a bug in framework that may undercount the scanning time

Bug: 63390581
Bug: 63964363
Test: RunSettingsRoboTests
Change-Id: Ia762f580462823e8eddccbeb12dec3876b0ef47a