Merge "Export related make variables for gralloc.default to soong" into main...

Merge "Export related make variables for gralloc.default to soong" into main am: b3984cac am: 7f937c4b

Original change: https://android-review.googlesource.com/c/platform/build/+/3211281



Change-Id: I43729d8cc69347434d97ad951d10b1778f7f4421
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>