Merge "Serialize LightFlattenable trivially copyable objects as LightFlattenable" into sc-dev am: f1dd8a9e6c

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/13612153

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I148013ee03ad604008b99effe4042b085730bf68