Merge "Move disable downloads to bazelrc from mixed build" am: be981e5e

Original change: https://android-review.googlesource.com/c/platform/build/soong/+/2515275



Change-Id: I398c531f7de2fb907c10a5eca304050686aedb42
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>