Camera: Register LensShadingMap marshaler

- CameraMetadataNative has a LensShadingMap unmarshaler to unpack the
  LensShadingMap in to an object
- this adds the marshaler to pack the LensShadingMap into
  CameraMetadataNative

Test: atest frameworks/base/core/tests/coretests/src/android/hardware/camera2/impl/CaptureMetadataNativeTest.java
Bug: 264307946

Change-Id: Ic8eedcea4b65df34ae63b9b43059d77278c76b34