Share the EGL image interface between implementations. BUG=18110152 Change-Id: Ia36cc97c0f1b6609382ebaed7ef55231d22d9519 Reviewed-on: https://swiftshader-review.googlesource.com/1252 Reviewed-by: Nicolas Capens <nicolascapens@google.com> Tested-by: Nicolas Capens <nicolascapens@google.com>