Notify TouchpadDebugActivity on finger/hardware state changes

Notifying TouchpadDebugActivity with any change in the finger or hardware state of the touchpad connected to the device and transferring it from TouchpadInputMapper to InputManagerService using JNI.

Bug: 286551975
Test: Manual testing by flashing the device and tracing the logs
Flag: com.android.hardware.input.touchpad_visualizer
Change-Id: I4922db24f7569f6a6a3581235b4d43966e4b808b