Revert "Camera2: fix camera has stopped" after long press camera key"

This is breaking the i9500 camera,
after reverting this also needed to revert
http://review.cyanogenmod.org/#/c/75946/

This reverts commit 6818971085cba3f6d06b9c9a46f1a7b8b72c691c.

Change-Id: Ia1c251a7ffd838e02e8587f7f70854de8adb9088
Revert "Revert "camera: add support for samsung and htc camcorder modes""

This reverts commit f19adb54a1dc0103751f581772983ef77a357457.
Revert "Camera: open Camera and start Preview in a seperate thread."

Change-Id: I584637c627e39239379800e970d12f69558367e3