Implements GLES 3.0 functionality for the new command recording style.
Tested with angle_end2end_tests. dEQP/CTS testing will come later.

Bug: angleproject:4029
Change-Id: Ibdc4f1355a7b880946699ec227fd9807f4a27af9
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2040197Reviewed-by: Cody Northrop <cnorthrop@google.com>
Commit-Queue: Jamie Madill <jmadill@chromium.org>