More native input dispatch work.

Removed old input dispatch code.
Refactored the policy callbacks.
Pushed a tiny bit of the power manager state down to native.
Fixed long press on MENU.
Made the virtual key detection and cancelation a bit more precise.

Change-Id: I5d8c1062f7ea0ab3b54c6fadb058c4d5f5a9e02e
23 files changed