Fix InputDevice listener notification for merged controller.

Merged game controllers report unique device id combined from multiple
input devices, when notifying device listener input manager will send
a list of devices unique to each other.
When an event hub device is added to a input device, the generation Id
must be bumped to generate a device changed event for input device
listener.
Fixed the Sony game controller connection failure.
Fixed the duplicate device listing in input service dump.

Bug: 168338098
Test: atest inputflinger_tests
Change-Id: Ie4f57215880ff06264a7c4f80c505cf4acc6bca5