Update EGL_GL_COLORSPACE_BT2020_HLG_EXT to the correct value am: 704ade2ba7

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/23516798

Change-Id: I6a732b69ff2c44c72255a97a4a49c1475ac00606
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>