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

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

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I2b13e27beca9e723680a847fd2d5c98b74effdb5