[automerger skipped] ueventd: Fix a race condition in handling device-mapper...

[automerger skipped] ueventd: Fix a race condition in handling device-mapper events. am: 4866d284 -s ours

am skip reason: Merged-In I258de5de05d813c3cb7f129e82e56dbfe8bf3117 with SHA-1 59abbfe6 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/system/core/+/23598091



Change-Id: If89394b74856a08c24b82612228354f5aa0b4430
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>