Merge "Add ABS_MT_SLOT config to virtual touch screen." into tm-qpr-dev am: 95c55fb3

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/19908041



Change-Id: Idcd8b415e725ea05928e1d47732e3659a39d5c95
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>