Ensuring AnalyticsUtil isn't run while FBE locked

When performing analytics, AnalyticsUtils accesses sharedpreferences
that aren't available while File based encryption locked. This change
ensures that the AnalyticsUtil isn't initialized unless it's needed.

Bug=26822105
Change-Id: Ib35cd89a9844a75c04294cdb99e9d7b4b6448825
1 file changed