Currently GLDrawableFactoryImpl's gamma settings are performed
only on the main screen.
Allow passing a NativeSurface, so it's display/screen
gamma values will be changed.
Further, promote low-level gamma settings to GLDrawableFactory
for direct usage.
Change com.jogamp.opengl.util.Gamma to use a GLDrawable
instead of a GL object to clarify that we use the drawable.
Also add a GLAutoDrawable variant, allowing proper locking
of its 'upstream-lock' to guarantee atomicity.
Fixed as described in commit 15b9e36e80d6f62f7dfb5c45d00cd04de2007ee5