Reland: Use "gfxstream" namespace am: c5a1807964

Original change: https://android-review.googlesource.com/c/platform/external/gfxstream-protocols/+/2513870

Change-Id: I28007e4f6733b1febf75c486a904be0acda40754
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>