chore(non linear font scaling): add FontScaleConverter tests to presubmit

Reduce scope of tests so they don't time out.

Test: atest FrameworksCoreTests:android.content.res.FontScaleConverterTest \
  &&  atest FrameworksCoreTests:android.content.res.FontScaleConverterFactoryTest \
  &&  atest FrameworksCoreTests:android.util.TypedValueTest

Bug: b/264885708

Change-Id: I0915fb68cb228360fb26897edc2f1c1ccbd526d4
3 files changed