Change jsonVariationMap to array of struct am: 8097d1a0e6 am: 465668494e am: b753906270

Original change: https://android-review.googlesource.com/c/platform/build/blueprint/+/2059708

Change-Id: I8f7c098edb84a512d520618375c5832e9ac7d040
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>