star: Override vendor's usb_audio_policy_configuration

Android 8.1 added the support for new type of USB Audio devices
(USB_HEADSET, instead of old USB_DEVICE)
Some older USB devices got converted to this USB_HEADSET while still
using the old protocol.
There is no driver change needed, but the audio policy needs to be
changed.
Since vendors are simply using AOSP usb_audio_policy_configuration
Override it by ourself.

Change-Id: I5c43cd7c95f721914cf94f4dc20c992b4f6a24e9
Signed-off-by: Jesse Chan <jc@lineageos.org>