Reset touch state when device resets

At any point in time, an input device may be reset. We already generate
cancel events to handle this situation.
However, that's not sufficient.

In this CL, touch state is cleared of all pointers for the device that
is getting reset.

Bug: 273376858
Test: m inputflinger_tests && $ANDROID_HOST_OUT/nativetest64/inputflinger_tests/inputflinger_tests --gtest_filter="*NotifyDeviceResetCancelsHoveringStream*"
Change-Id: I66da4f3eec125a6b260ed1478bca00164bb40c9e