Turn off TWOLINE_TEXT_ALLAPPS

Turning off twoline text for all_apps since we will revisit with UX to minimize grid size changes.
The ENABLE_TWOLINE_DEVICESEARCH is fine to be kept on.

bug: 270390937
test: manual-presubmit
Flag: flipping on -> off
Change-Id: I262f809d43b0781c1942bf7176869d6b74e77f1e