fix(HCT): Update HCT text color

User experience research indicates that users want links to keep their original colors, which helps them easily recognize them as links.

Bug: 384793956
Flag: com.android.graphics.hwui.flags.high_contrast_text_inner_text_color
Test: manual
Test: enabled/disabled Flag & atest cts/tests/tests/uirendering/src/android/uirendering/cts/testclasses/TextViewHighContrastTextTests.kt
Change-Id: Ie24825b641b85fd0af0f0404c5b92111b3e3f139