[ACR-1688] Add new APIs for network camera

[ACR-1688] Add new APIs for network camera

- New API list
: camera_create_network()
: camera_device_manager_initialize()
: camera_device_manager_deinitialize()
: camera_device_manager_foreach_supported_device()
: camera_device_manager_add_device_connection_changed_cb()
: camera_device_manager_remove_device_connection_changed_cb()
: camera_is_supported_extra_preview()
: camera_set_extra_preview_cb()
: camera_unset_extra_preview_cb()
: camera_set_extra_preview_stream_format()
: camera_get_extra_preview_stream_format()
: camera_attr_set_extra_preview_bitrate()
: camera_attr_get_extra_preview_bitrate()
: camera_attr_set_extra_preview_gop_interval()
: camera_attr_get_extra_preview_gop_interval()
: camera_attr_get_preview_frame_rotation()

[Version] 0.4.80
[Issue Type] New feature

Change-Id: I7686cd0de15679e51efcd69c297ebac1239408e9
Signed-off-by: Jeongmo Yang <jm80.yang@samsung.com>