Revert "Use the StorageStatsManager in FileCollector."

This reverts commit bd441caaf6fb268b2756bc51304efa038bf58376 due to
causing NPE crashes.

Bug: 37314851
Change-Id: I933eaa3888f84945873de8f7fca0d235306f6aaa
(cherry picked from commit 3cf3b199e3e120f23f54eb7f9905c8d285cb8a28)
3 files changed