[automerger skipped] Fix NPE in TouchpadDebugViewController am: c2282c01 -s ours

am skip reason: Merged-In I4dc7de5fcc05fe20cc17c1540bbef2b1d78c6465 with SHA-1 3556310b is already in history

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/3558203



Change-Id: I76381839deba9d47e240a43f743a2ec929461d52
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>