Adjust value_range for random_contrast and random_hue

[shashaka]

I’ve updated the processing logic for the value_range argument in the following components:

1. random_contrast

• Added the value_range argument.
• Corrected the existing test cases and added new test cases to validate the value_range functionality.

2. random_hue

• Set a default value for the value_range argument.
• Introduced new test cases to cover the value_range functionality.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.95%. Comparing base (84b531c) to head (bc8b6ae).

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #20671   +/-   ##
=======================================
  Coverage   81.95%   81.95%           
=======================================
  Files         543      543           
  Lines       50663    50664    +1     
  Branches     7828     7828           
=======================================
+ Hits        41523    41524    +1     
  Misses       7246     7246           
  Partials     1894     1894           

Flag	Coverage Δ
keras	81.79% <100.00%> (+<0.01%)	⬆️
keras-jax	63.90% <100.00%> (+<0.01%)	⬆️
keras-numpy	58.82% <100.00%> (+<0.01%)	⬆️
keras-openvino	29.95% <33.33%> (-0.01%)	⬇️
keras-tensorflow	64.65% <100.00%> (+<0.01%)	⬆️
keras-torch	63.72% <100.00%> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.