Add name arg to MobileNet V1 and V2

[jeffcarp]

Followup from #19695 and 2b7120b.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 66.66667% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 81.47%. Comparing base (310c275) to head (05b9c38).

Files	Patch %	Lines
keras/src/applications/mobilenet.py	66.66%	0 Missing and 1 partial ⚠️
keras/src/applications/mobilenet_v2.py	66.66%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #19712      +/-   ##
==========================================
+ Coverage   78.52%   81.47%   +2.94%     
==========================================
  Files         498      498              
  Lines       45769    45773       +4     
  Branches     8456     8458       +2     
==========================================
+ Hits        35942    37294    +1352     
+ Misses       8091     6577    -1514     
- Partials     1736     1902     +166     

Flag	Coverage Δ
keras	81.32% <66.66%> (+2.94%)	⬆️
keras-jax	64.89% <66.66%> (+2.94%)	⬆️
keras-numpy	56.44% <0.00%> (+0.15%)	⬆️
keras-tensorflow	66.36% <66.66%> (+2.94%)	⬆️
keras-torch	64.94% <66.66%> (+2.93%)	⬆️
keras.applications	80.40% <66.66%> (?)
keras.applications-jax	80.40% <66.66%> (?)
keras.applications-numpy	22.95% <0.00%> (?)
keras.applications-tensorflow	80.40% <66.66%> (?)
keras.applications-torch	80.13% <66.66%> (?)

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[fchollet]

LGTM, thank you!