Misc fixes in settingslib

Bug: 62039146
Fix: 62138362
Test: make RunSettingsLibRoboTests

- Do not use enhanced loop in lifecycle events to avoid Concurrent
modification exception.
- Tweak footer preference icon layout
- Add some logging to help debug future suggestion issues

Change-Id: I08eb3aca4b776a7d7e5db75dff8f92904d482aa3