Merge "Add null check for input view." into udc-dev am: e5cc0bf4d4 am: 25086039c3

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

Change-Id: Ib2aaefe0d5e4a726e858b0e81c7b8bd96b237744
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>