Cleanup button wake settings (2/2)

Change-Id: Ie37136cbd57c4c334321abbfa4543727e940bc43

Keep quiet when volume keys are used to wake up device

- Userspace will make a 'beep' with it receives a key up, so
  consume that event as well.
- Removed wake key check in music control code as it will already
  be disabled here.

Change-Id: I93839acd39aec8a2ee40291f833a31f6b048c9f8

Wake Keys: enforce the wake keys overlay

* Keys disabled as wake keys by the overlay were
  still being allowed to wake the device. This change
  enforces the hardwareWakeKeys settings.

Change-Id: Ifde0491b2de64a7f61a101cf22f5589cb5e841e2

Allow disabling Search/Recents button wake (2/2)

Change-Id: I6a2ac064efc4fe85413bf0b935c28aa7bde5d672