Camera: Fix camera crash when post picture taken in message app

When post the picture taken in message, the gestures should be
disabled, that's to say, you can not touch screen to AF or show
the preference menu.
1. Disable gestures.
2. Disable keyevent.

Change-Id: I70d478979b0738334886dc3ca6534ca428159339
CRs-Fixed: 520918