Create a Measurement filter

Have you checked out the doc? Not all of the REST API supported filter are supported in the SDK unfortunately.

https://resources.cumulocity.com/documentation/javasdk/current/com/cumulocity/sdk/client/measurement/MeasurementFilter.html

Beside that you can add non-supported query params by implementing them yourself, roughly described here (e.g. extending the existing filter etc.)