Port buffer object streaming from OpenGL renderer in Java mode

[codeanticode]

OpenGL ES 3.0 supports buffer object mapping:

https://www.khronos.org/registry/OpenGL-Refpages/es3.0/html/glMapBufferRange.xhtml

which will make it possible to port buffer object streaming recently implemented in the Java mode:

processing/processing4#196

[codeanticode]

Duplicate of #697