GL: Use ANGLE_GL_TRY when setting pixel pack and unpack state. Bug: angleproject:3020 Change-Id: Ifd36973d66c850d0d0520d9721ab9e5294489b39 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2134424 Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Jonah Ryan-Davis <jonahr@google.com> Commit-Queue: Geoff Lang <geofflang@chromium.org>