Merge "Modify comments for SurfaceSession." into main am: 6dfecff783

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/3026884

Change-Id: Icce95cd1f2c8c20231f1327583573183ccc57c58
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>