[automerger skipped] Revert "Updates encoding/decoding of optional metadata" am: db7df5dd -s ours

am skip reason: Merged-In Iaa4cf4c0e991fab03dbb9c7665afb92a052f4210 with SHA-1 c6359e48 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/18328412



Change-Id: Ibc0a3be46f035dd50f1d962778f5479d0b5c9996
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>