Allow TOUCHSCREEN event observing while TouchExploration is enabled. am: 306dc39d62 am: ecb76d3388

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/29006683

Change-Id: Ia1b0e11aab4947a3e96940d081655f96c73b6561
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>