Merge "libutils: group deprecated RefBase functions" am: 4efe03b492 am: 7e2a6bf3b0 am: 20606f64bd

Original change: https://android-review.googlesource.com/c/platform/system/core/+/1673555

Change-Id: I88aad9df554c90358b019200a26c5adfa0b440a3