Delete Textures, Renderbuffers and Framebuffers that were created in the
SurfaceType::Offscreen case, when they were initialized.

This caused a crash when replaying traces using GLES 1 contexts
on native GLES Android implementations.

Bug: angleproject:5932
Change-Id: Ice4bcec620a6c3530044986ce39230b030a901ab
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2877234Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Cody Northrop <cnorthrop@google.com>
Commit-Queue: Cody Northrop <cnorthrop@google.com>