Enabling auto-hyphenation for shortcut description text.

Flag: com.android.systemui.keyboard_shortcut_helper_rewrite
Test: Manual - open shortcut helper, using one of the affected locales
and ensure that when linebreak happen in shortcut description text a
hyphen is added in the appriopriate place.
Fix: 419205387

Change-Id: Ie8248ce699d8bc7bd095848558fa04aa265b7c9f