Merge "bootstat: remove unused FDE boot events" am: 6e74f8c4a6

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

Change-Id: Ibbdfe2b696bd2ae5ad2ec90878760c4ff7c798b7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>