Update Focal Point Handling

[Jotschi]

The stored focal point information of a binary field is currently not being utilized for regular image resize requests.

We already support this information for image transform requests. See:

mesh/core/src/main/java/com/gentics/mesh/core/endpoint/node/BinaryFieldHandler.java

Line 464 in 87c6ba1

FocalPoint focalPoint = initialField.getImageFocalPoint();

Possible place to add this:

mesh/core/src/main/java/com/gentics/mesh/core/endpoint/node/BinaryFieldResponseHandler.java

Line 77 in 87c6ba1

Flowable<Buffer> resizedData = imageManipulator.handleResize(data, sha512sum, ac.getImageParameters())

TODO:

• Add impl
• Add tests
• Add changelog
• Add docs

[Jotschi]

@rafacm Change was released in 0.22.0