[automerger skipped] Add missing @NonNull to BaseRecordingCanvas am: 311a2a447c -s ours

am skip reason: Merged-In I090c3f749e6ac2321d59189f5ec1a4f27179dd82 with SHA-1 97488d728d is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/25463263

Change-Id: Iaba683920db12f88884d7819fe1f6833fea2539e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>