Add CDD annotations to the screen pinning test am: 5383350eb0 am: 6c10ab51c9 am: 9fef0331e5

Original change: https://googleplex-android-review.googlesource.com/c/platform/cts/+/19523990

Change-Id: I3925da5b8daecb0060cfd09f53a3fcc5888816a0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>