Merge "surfaceflinger: Only restart zygote if already running." am: 305af2eb09 am: bf8b6896a4 am: bfdfe9a52b am: 9f2f8fb3aa

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/1909853

Change-Id: If00e1e6aea06e8ebdf496ee734b052d242960ee6