Use strong pointer in ALooper to avoid use-after-free am: 7d712cfe6d am: 3eb9984044 am: fa817e30bd

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/hardware/interfaces/+/13209505

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Id1da97d23c4f22fbe9e3e174542921e5021fa1f4