Fixing imports in init file and preset name update (#2108)

* Fixing import in init file and preset name update

* adapted the latest preset format style

Author: laxmareddyp

keras_hub/src/models/mobilenet/__init__.py

@@ -0,0 +1,5 @@
+from keras_hub.src.models.mobilenet.mobilenet_backbone import MobileNetBackbone
+from keras_hub.src.models.mobilenet.mobilenet_presets import backbone_presets
+from keras_hub.src.utils.preset_utils import register_presets
+
+register_presets(backbone_presets, MobileNetBackbone)

keras_hub/src/models/mobilenet/mobilenet_presets.py

@@ -1,10 +1,10 @@
 """MobileNet preset configurations."""
 
 backbone_presets = {
-    "mobilenetv3_small_050": {
+    "mobilenet_v3_small_050_imagenet": {
         "metadata": {
             "description": (
-                "Small Mobilenet V3 model pre-trained on the ImageNet 1k "
+                "Small MobileNet V3 model pre-trained on the ImageNet 1k "
                 "dataset at a 224x224 resolution."
             ),
             "params": 278784,