Merge "Add support for only starting 64 bit zygote." am: 10126261 am: 594a67ce am: 6c2d6ee6

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2061509



Change-Id: I20e4ce3002bb6f4718606b4317f72ff0ea155802
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>