Replace envvars with ninja.environment am: 0daf08c1ae am: b06175eef8 am: 3df4bbdf99

Original change: https://android-review.googlesource.com/c/platform/build/orchestrator/+/2459852

Change-Id: I88ad0b15c8af4861671fe9407f1034da2a97e2bb
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>