Code review comment for lp:~andreas-pokorny/mir/use-input-channel-to-send-input

So in the end we will have to go all the way and refactor android::InputDispatcher already now. :(

Making it only shepherd events through android::InputChannels (exactly like its stripped-down version existing in lp:~unity-team/+junk/qpa-mirserver) and leaving the responsibility of selecting which input channel gets the input event coming out of the android::InputReader to another entity (in the qt compositor case, the QQuickWindow dispatch logic that selects the qml item that will receive incoming input) that receives all input coming out of android::InputReader and calls mir::input::Surface::consume_event on the surface it decides that should receive the event, if any.