Lower severity for invalid accessibility hover event stream to ERROR. am: 2f99cdb915 am: b63e604fd2

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/24300485

Change-Id: I00a1224f9b7c190c8f6a5847707ce3ca52bea1e3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>