Flip the INTERRUPTION_FILTER_ALL switch

Instead of "Limit what can notify you", title is now "Allow all notifications" and its behavior is reversed (switch ON hides people/apps/other).

Fixes: 360359116
Test: atest InterruptionFilterPreferenceControllerTest + manual
Flag: android.app.modes_ui
Change-Id: Ibb5334889662ec3aa778cd74c51506718ab0ebc7

src/com/android/settings/notification/modes/ZenModeFragment.java

@@ -77,7 +77,7 @@ public class ZenModeFragment extends ZenModeFragmentBase {
                 new ZenModeTriggerAddPreferenceController(context, "zen_add_automatic_trigger",
                         this, mBackend));
         prefControllers.add(new InterruptionFilterPreferenceController(
-                context, "allow_filtering", mBackend));
+                context, "allow_all", mBackend));
         prefControllers.add(new ManualDurationPreferenceController(
                 context, "mode_manual_duration", this, mBackend));
         return prefControllers;