Preserve multi-touch slot state when resetting input mappers am: 6c7fd13c

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/20083038



Change-Id: Ib5b1867903955458c8d9ff7fa5ec5911ae521172
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>