IOStream => gfxstream::IOStream. am: 1b3a9d8919

Original change: https://android-review.googlesource.com/c/platform/external/gfxstream-protocols/+/2566050

Change-Id: I8a39431d5f7e3f86034c54a8d5a1e7b2de710c14
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>