Merge "Set download_tmp_dir explicitly to be a directory under the output...

Merge "Set download_tmp_dir explicitly to be a directory under the output directory." into main am: 67b49731 am: c0aa94c1

Original change: https://android-review.googlesource.com/c/platform/build/soong/+/2781987



Change-Id: Iee7e821280c9178873d4599feee45471f7deed5d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>