Merge "Move startRBE error handling to the main goroutine" into main am: 31783628 am: 60b62f67

Original change: https://android-review.googlesource.com/c/platform/build/soong/+/2849973



Change-Id: Id26b7417c41461bf17f19f213cdb8a21fc140a8f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>