Fix performance regression create_PrecomputedText_NoStyled_Greedy_NoHyphenation_DirDifferent_min

The LineBreakConfig instance in the StaticLayout is null as default.

Because the LineBreakConfig in StaticLayout was not initialized, the null instance was brought to PrecomputedText and caused the function PrecomputedText.Builder#checkResultUsable to return UNUSABLE.

Bug: b/220992481
Test: atest StaticLayoutTest; atest StaticLayoutPerfTest
Change-Id: I93bcb6ebc35344e34e9bb8a24df375aa7b3a8d81