Remove Battery Settings page default tips

 - Remove SummaryTips from default tips
 - Clean up test file import
 Screenshot: https://screenshot.googleplex.com/6rYrnMvoTbeCS7m.png

Bug: 183079415
Test: make RunSettingsRoboTests -j40
Change-Id: I1001d75235a6d8d5947b974939884103eb0834da
6 files changed