Merge "Export variable to soong for converting vintf_compatibility_matrix" into main am: 00378b19

Original change: https://android-review.googlesource.com/c/platform/build/+/3195839



Change-Id: Ifb6f5a83399a69e9798a5026901d32aa2c05e303
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>