Merge "Update input event type to enum class" into udc-dev am: 150c188a am: 3f7426bf

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22600156



Change-Id: Iedc8124f6b3e8119b29f7abf04d67211c92d9d26
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>