Add utils for AIDL types conversions am: 6b6dfcd439 am: f9a2287d30 am: 019a078914

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1580710

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I98635320b3b6ce6b1ce1922bf9606b496c9d01ad