Merge "Improve error message in WMS#isInTouchMode" into udc-dev am: a69c3fe7

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22913696



Change-Id: Ia9c2805d4482c841deaf0f36f53372dac7313a5b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>