Merge "Log warnings to stdout instead of stderr" into main am: a6428535 am: 86a72c2a

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



Change-Id: I60d743fe4a90fb487c045cd5d407366f9a56df18
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>