Rename Indexable::getAllPreferenceControllers.

To getPreferenceControllers. "all" is redundant. Then internally, the
old getPreferenceControllers() is renamed to
createPreferenceControllers() to emphasize the controllers are created
from code (versus the ones created from xml).

Bug: 73668763
Test: robotest
Change-Id: Ifec46aefdc2a418031c8e152028b30bdcd396fc7

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

@@ -98,7 +98,7 @@ public class ZenModeAutomationSettings extends ZenModeSettingsBase {
                 }
 
                 @Override
-                public List<AbstractPreferenceController> getPreferenceControllers(
+                public List<AbstractPreferenceController> createPreferenceControllers(
                         Context context) {
                     return buildPreferenceControllers(context, null, null, null);
                 }