Moved zenMode visual effects + automatic rule page

- Automatic zen rules have their own page like in N
- Minor string changes to page and add rule dialog
- Zen mode visual effects was moved into behavior settings

Bug: 63077372
Test: $ make SettingsUnitTests -j40
$ adb install -r ${OUT}/data/app/SettingsUnitTests/SettingsUnitTests.apk
$ adb shell am instrument -w com.android.settings.tests.unit/android.support.test.runner.AndroidJUnitRunner

Change-Id: I9635f8f7969b76d036bc06ec44705815e540777a

src/com/android/settings/notification/SoundSettings.java

@@ -244,7 +244,6 @@ public class SoundSettings extends DashboardFragment {
                     List<String> keys = super.getNonIndexableKeys(context);
                     // Duplicate results
                     keys.add((new ZenModePreferenceController(context)).getPreferenceKey());
-                    keys.add(ZenModeSettings.KEY_VISUAL_SETTINGS);
                     keys.add(KEY_CELL_BROADCAST_SETTINGS);
                     return keys;
                 }