Merge "aconfig: package.map file serialization" into main am: 4575b273fe

Original change: https://android-review.googlesource.com/c/platform/build/+/2869374

Change-Id: Ia40c4642611f2dc5fd27c80ac8a291784a284a10
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>