Merge "Remove the IntegrityFileManager class that is unused after cleaning up references from AppIntegrityManagerServiceImpl." into main am: 454a21406a

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/3315773

Change-Id: Ibd92ec25de5135b25ed70e1590abfa9620b02422
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>