Merge "bootstat: remove unused FDE boot events" am: 6e74f8c4a6 am: 2e13ea6fcd

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

Change-Id: I719b3d5e520efcba180741d210a980cbbe8f109c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>