Merge "Add a comment on how to achieve shared_from_this for SharedRefBase." am: 3f285c72d6

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/2116896

Change-Id: I0177ab0ff381ee88548a8aad44c176e726e181ec
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>