Revert "Use "gfxstream" namespace" am: 5d733516cb am: a2eab488d2

Original change: https://android-review.googlesource.com/c/platform/external/gfxstream-protocols/+/2514001

Change-Id: Ia449d60adaa4981f0d7ae24de11cec1ad88399a1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>