First step in refactoring Index.java

Handles the following refators:
 - Indexing code into: DatabaseIndexingManager
 - Indexing utility methods into: DatabaseIndexingUtil
 - XML Parsiing utility methods into XMLParserUtil

Bug: 33451851
Test: make RunSettingsRoboTests
Change-Id: I4264ad3806d1bd3a66d879c16ad6c8315ecb832b
7 files changed