Apply and Track EGL_GL_COLORSPACE_KHR

As part of implementing EGL_KHR_gl_colorspace we need to
keep track of the EGL_GL_COLORSPACE_KHR so that eqlQuerySurface
gets the value the application set.
Do the work in the EGL layer because colorspace information
is not handled in the driver.
Test: adb shell /data/nativetest/EGL_test/EGL_test
Bug: 37709988

Change-Id: Ic92e717a46769144d724f4a84fb3560df076da4f