fix(hct): Hardcode the names of Outline text and HCT in our notif.

This should help prevent localization issues caused by capitalization of
this templated string, since these feature names should not be
capitalized unless they are at the beginning of the sentence.

The 'Settings' app name should always be capitalized since it's the
proper name of an app, so that remains templated.

Bug: 399358129
Test: atest HighContrastTextMigrationReceiverTest;
      (this test asserts against a hardcoded version of the entire
       string)
Flag: com.android.graphics.hwui.flags.high_contrast_text_small_text_rect
Change-Id: Iaaa2ac10a56c1e4f7e5a8fd0d1c8eaf8b0293a27