Fix for crash when height or width is nil

[abhi06276]

This PR fixes the issue of height/width being nil in line no 128 of RCTImagePickerManager.m .
[self _dismissPicker:picker args:tempImageTag ? @[tempImageTag, height, width] : nil];
Fixes#20411

Test Plan

To verify the fix , please make the changes to make either height, width or both nil
in - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *, id> *)info function of RCTImagePickerManager.m , run the code , you will see the error saying , one of the argument is nil from the array .

Now run the code with the fix , it will not crash .

Release Notes:

[IOS][BUGFIX][RCTImagePickerManager] - Change in RCTImagePickerManager to handle crashes if height/width is nil .

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	Warnings
⚠️	📋 Release Notes - This PR may have incorrectly formatted Release Notes.

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This pull request was closed by @abhi06276 in 82af7c9.

Once this commit is added to a release, you will see the corresponding version tag below the description at 82af7c9. If the commit has a single master tag, it is not yet part of a release.