Reduced "rx::vk::kInFlightCommandsLimit" from "100" to "50". The "100" value is too high and causes "S21 Adreno" block in "vkQueueSubmit()". This is a temp solution. Patch authored by Igor Nazarov <i.nazarov@samsung.com> Bug: angleproject:6401 Change-Id: Ie7f9c8ef5311b17325640cae0f613ece768c0fa3 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3165666 Reviewed-by: Charlie Lao <cclao@google.com> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>