Merge "Include what you use in event_checkers.h" into main am: 17b71ae0 am: 43abe57e

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/2863323



Change-Id: I50e3ee774b631d81d4f0dfe53c5436d62583cd83
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>