Add dump for InputState and InputTarget

These are useful when you want to print these variables for debugging.
Currently, InputState isn't even shown in the dispatcher dump. Include
it there.

Also, update some types to use DeviceId.

Bug: 211379801
Test: TEST=inputflinger_tests; m $TEST && $ANDROID_HOST_OUT/nativetest64/$TEST/$TEST
Change-Id: Ifc983a653d9f1f546b71b8404f67caa1c89d3b01