Merge "Delete TouchState::source" into udc-qpr-dev am: 5cf5ea193c

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/23059552

Change-Id: I1d47cf8e3827819645d5bb82a7ed53fe8aecfc90
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>