camera: fix image capture review mode when zsl is enabled

Choosing "Take Photo" to change a contact image doesn't show
the captured imaged after taking a snap if ZSL is enabled.
Also observed on apps that use the native camera to capture
an image like Whatsapp.

In ZSL mode, the preview is not stopped, due to which the
review mode (ImageCapture) doesn't show the captured frame.
Hence stop the preview if ZSL mode is active so that the
preview can be restarted using the onReviewRetakeClicked().

Also, reset the autofocus and set the camera to idle only
when the ZSL mode is active. This fixes issues with non ZSL
cameras where autofocus works even during the review mode
after taking the snap since the camera state is set to idle.

Change-Id: I2aa3f4146575329c6fefb259b09937108084fdab