Merge "lshal: use std::async" into main am: 39700158d7 am: 8777ba2234

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/2876744

Change-Id: I864a2afadbd4490f89664ad16e27cb0aed94b5b5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>