fix(HCT): High Contrast Font threshold value is different

NO_IFTTT= fix the threshold is different with DrawTextFunctor.h

Bug: 394359791
Flag: com.android.graphics.hwui.flags.high_contrast_text_small_text_rect
Test: atest core/tests/coretests/src/android/text/LayoutTest.java
Change-Id: I121f28aab8a5a72b683f83c5233d81f3c0adb37e