Set self signed CA via environment variables am: 69c89f53ae am: 34a705f263

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Car/DebuggingRestrictionController/+/13413083

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ia0a25aebe328aa3570875ae60d62646678fd0814