ffc7ced2a0
Ensures that the onscreen command buffer is blocked via the render ready semaphore, instead of just the layout transition. I can confirm this fixes the rendering artifacts on the Samsung a50 - which I suspect are the same as the issues these other devices are having. Essentially, without the semaphore protecting the onscreen pass we can end up writing to the color attachment while it is still being read. * https://github.com/flutter/flutter/issues/160522 * https://github.com/flutter/flutter/issues/160370
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