fix wrong substring

The tokenOffsets is the offset from trimed contentLine.
But it is used in substring as the offset from un-trimed contentLine.

How to reproduce bug (ICS and before):
1. Add a contact record with name and a phone number (ex. 090-1111-2222)
2. Search by "0" in Contacts app
3. Contacts shows a wrong number something like "0900111102222"

Change-Id: I1e1cb2f3bd135d98e1573a50aa6ddc021af35b9f