Merge "bootstat: remove unused FDE boot events" am: 6e74f8c4a6 am: 2e13ea6fcd am: 63d5227282 am: 9bcc76971d

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2232787

Change-Id: I82d953273232effc84d5957679f734af9bea3b6a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>