Update random_crop_and_zoom.py (#2294)

* Update random_crop_and_zoom.py

* Update description

* rename file

examples/layers/preprocessing/classification/random_crop_and_zoom.py → examples/layers/preprocessing/classification/random_crop_and_resize_demo.py

@@ -12,8 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-"""random_resized_crop_demo.py.py shows how to use the RandomResizedCrop
-preprocessing layer. Operates on an image of elephant. In this script the image
+"""This demo example shows how to use the RandomCropAndResize preprocessing
+layer. Operates on an image of elephant. In this script the image
 is loaded, then are passed through the preprocessing layers.
 Finally, they are shown using matplotlib.
 """