Type of search on headset key long press must depend on device state

When the user long presses on the headset key, the type of search
 that will launched must depend on the state of the device. The
 following logic is implemented:
 - screen on and device unlocked: action is ACTION_WEB_SEARCH,
 - device locked or screen off: action is ACTION_VOICE_SEARCH_HANDS_FREE
    with EXTRA_SECURE set to true if the device is securely locked.

Bug 6518222

Change-Id: I318770346b8d83e44dfcd4154bcdb517ea7098b5