Add home settings toggle featureflag for enablingTwoLineText

- Have shouldUseTwoLine() be decided with the home settings toggle value

bug:316027081
spec: https://www.figma.com/file/uMzPkNMZpb7EyfHDo8usIa/V-%E2%80%A2-Toast-Butter?type=design&node-id=405-384593&mode=design&t=UBkdeuNlAdRh2FGU-0
Test:
Video: https://drive.google.com/file/d/15VUhNVro2fiwv3SzMda1StiPb3PV1eMT/view?usp=sharing
before searchPreferenceScreen: https://screenshot.googleplex.com/3uqdMsZoGSBYb6c
after searchPreferenceScreen: https://drive.google.com/file/d/15dswiHRTnafyhgQA_tL2tRc7vHFWdHbZ/view?usp=sharing
before homeSettingsPage: https://screenshot.googleplex.com/7wsNevxGun2KCCB
after homeSettingsPage: https://drive.google.com/file/d/15m5bjEyewlNHI_h26aygHa7zrgZ5qDF6/view?usp=sharing
AppListSettingsPage: https://drive.google.com/file/d/15hl4ScHBOLgKv3M38HtatMxQw85pgl7t/view?usp=sharing
Flag: enableTwolineToggle DEVELOPMENT

Change-Id: I3ad133dd51dcb97e14ccded730e7737c5049261a