test(pointing): Add mock input device.
New mock input device to generate input events for tests.
test(split): Add peripheral input test.
Test event propagation from peripheral input devices.
fix(split): Proper scoping for local within switch.
Minor compile fix.
chore: Fix up test snapshots after logging changes.
Adjust the test snapshots after logging changes to the central.
fix(kscan): Don't fire last mock event twice.
Fix a bug where the kscan mock would raise the last mock event
twice before halting processing.
Pete Johanson