Correct the file name of FontScalingDialogDelegateTest

The test was updated to a wrong name when it is moved to
multivalentTests. Therefore, fix the file name.

Bug: 379216747
Test: atest FontScalingDialogDelegateTest
Flag: EXEMPT rename the file
Change-Id: I591925a7b4ebbecd5b623992e90cd551ff2c5918
1 file changed