Merge "Add null check for input view." into udc-dev am: e5cc0bf4d4 am: d2451ed04c

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23713002

Change-Id: I875652cd67b9afe95bcbaa95dee49cf0848189a4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>