Merge "Move debugfs mount/unmount to init-debug.rc" am: 3f4ea91c7c am: ff2460d0a2 am: 152eee7a05

Original change: https://android-review.googlesource.com/c/platform/system/core/+/1674965

Change-Id: I3f4d37b57a1f05dc665fc2690cd921ceaf4a147e