added true preview feature

Change-Id: Iab3c0d8085b019572e21e2efed885cc475e482fb
Put flash option back to Camcorder
Merge branch 'jb-mr1' of https://github.com/maxwen/android_packages_apps_Camera.git into jb-mr1-maxwen

Conflicts:
	src/com/android/camera/VideoModule.java