Refine incidentd error handling and logging

Added or changed some error messages and logging for easier debugging.
Log a few section errors to incident metadata in addition to logcat.
Also let incident reporting continue instead of failing when non-fatal
error occurs.

Bug: 119417232
Test: Take an incident report, and logcat.
Change-Id: Id18b7b690100923a8074d99b2312ee80c0bcd760