Lower severity for invalid accessibility hover event stream to ERROR. am: 2f99cdb9

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



Change-Id: I3c9b73f3c425a4fde43275a43c1060b6b41e6a98
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>