fix(non linear font scaling): optimize test to reduce flaky timeouts

Bug: 247861716
Test: atest FrameworksCoreTests:android.content.res.FontScaleConverterFactoryTest
Change-Id: I76d58a6d0b78f3ef1bd6c61040025f5b95487859

core/tests/coretests/src/android/content/res/FontScaleConverterFactoryTest.kt

@@ -90,11 +90,7 @@ class FontScaleConverterFactoryTest {
             }
             .forEach { (table, sp) ->
                 try {
-                    assertWithMessage(
-                        "convertSpToDp(%s) on table: %s",
-                        sp.toString(),
-                        table.toString()
-                    )
+                    assertWithMessage("convertSpToDp(%s) on table: %s", sp, table)
                         .that(table.convertSpToDp(sp))
                         .isFinite()
                 } catch (e: Exception) {