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