Merge "Log warnings to stdout instead of stderr" into main am: a6428535

Original change: https://android-review.googlesource.com/c/platform/build/soong/+/3094711



Change-Id: I455cbc577916378b5c808ef8c440f53e519ddacd
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>