Revert "Revert "Camera2: Don't try to cancel focus messages when preview stops""

This reverts commit 5d3c1e9096d00ed7c1f65aa355bde76a2c2161b6.
Revert "Rename camera blob"

This reverts commit 6ee660f085cec1375a63c3a24f325f2da809db65.
Revert "Build camera wrapper"

This reverts commit d22c5a775ebaaca891577fcd7848719901054acf.
Revert "camerawrapper: Do not cancel auto focus when preview is not running"

This reverts commit 03e1095b06db1c0dd187dea79a0d2ad0f55aba5e.
Revert "camera: Add wrapper"

This reverts commit 1db2d446cd1069387e01a4a148d2441051772727.