Merge "Document return value of AServiceManager_openDeclaredPassthroughHal" into main am: ddf0e82e3a am: 16fa610cae

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/2969432

Change-Id: I8292653d83aca466988146a653b4e9d4746a79a6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>