Use effective variation settings instaead of fakery

In case base typeface is used the fakery is empty.

Bug: 381879334
Test: atest android.graphics.cts.TypefaceTest#testEffectiveWeight_customFont
Flag: com.android.text.flags.typeface_redesign_readonly
Change-Id: I4d45016c612e7735fa3986cc16f5b948a0594f1d