Merge "Populate `ro.boot.qemu` for the emulator device" am: dce1f88bfb

Original change: https://android-review.googlesource.com/c/platform/system/core/+/1624291

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ic21c83a1ef590f19364181cd1e584ebabc2433b7