Fix hung input event while resizing

In onInputEvent inplementation, the finishInputEvent needs to be called
always, to report back the input event handling result. The previous
implementation will have no call for non-dragging event and throw them
away. This caused an ANR.

Test: reproduce step in b/144141494
Test: go/wm-smoke
Bug: 144141494
Bug: 122726344
Change-Id: If6f8da87609641a62d12712aa6c97a58a06bde60