[automerger skipped] Add serialization to libkll am: 388007f030 am: e3233f9438 am: 869f9b9779 -s ours

am skip reason: Merged-In I6f4877886c9b4d66fe7afb021a564aa1097545f5 with SHA-1 8d5e0e2968 is already in history

Original change: https://android-review.googlesource.com/c/platform/packages/modules/StatsD/+/1690945

Change-Id: Ib0edc9ce18651f0a513f53d90edca1fe3c04546f