USB Audio Hal: Fix CTS timestamp handling am: 61583424ff am: 980d917469 am: 3afbc70013

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/libhardware/+/15190378

Change-Id: Ief9f17b0a77ce6c4eb008a741f702e426fdccb31