Background distGzipFile to speed up CI builds am: ee3290d33a

Original change: https://googleplex-android-review.googlesource.com/c/platform/build/soong/+/18235420

Change-Id: I64639201b3094eca207ef4114da7942011f7da08
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>