Add full action printout to MotionEvent

Currently, not all actions are being printed in the input dump. This
results in hard-to-debug cases like the hover issue with multi-finger
operation before screen off.

Add printouts for all known action values, and add a number printout in
case an invalid value is received.

Bug: 169785626
Bug: 164506345
Test: adb shell dumpsys input
Change-Id: I885bf311eb28cca153887ebb382528927a736041