Moves ZenModeBypassingAppsSettings into modes dir

Copies these files into modes dir, so we can continue to deprecate the
old zen directory

Bug: 308819928
Test: flash+test, atest ZenModeAllBypassingAppsPreferenceControllerTest,
atestZenModeAddBypassingAppsPreferenceControllerTest
Flag: android.app.modes_ui
Change-Id: Ib18930bb16a3d675e460028f5c52ef32060541ad

Change-Id: Id6c8d834bbd106fef068c5f04acf8cd71229a5e3