Add EGL_EXT_image_gl_colorspace to EGL whitelist.

This extension will be required by CDD for Android P when the feature
android.vr.high_performance is present.

Bug: 32147090
Bug: 76152545
Test: Built and flashed Pixel XL, verified that the extension is present.
Change-Id: Id14d80c7ec6e956b317d227f9f1ab7b2aea656f2