When releasing buffer/image to external, the necessary barrier was
recorded on the "outside render pass command buffer".  However, if the
resource was used in the current render pass, that render pass should
have closed before this, otherwise the barrier was reordered before it
which is incorrect.

Bug: chromium:1136367
Bug: chromium:1135792
Bug: angleproject:5002
Change-Id: I237d5e6bb46189a4ce61c2f4602e356955cc87a9
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2468456
Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Charlie Lao <cclao@google.com>