Audio HAL: Update for the new definition of SinkMetadata

In Audio HAL V5.0 SinkMetadata receives a new member: optional
DeviceAddress. Use per field initialization to leave
the safe_union in an uninitialized state.

Bug: 120859615
Test: make
Change-Id: I358b9abbcb0690aebb2c658a72adb287ceec22b5
1 file changed