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 am: 875c0da4 am: 379bf4de

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



Change-Id: Ida868f0d12dac19f7cbac641c5de620af803978b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>