Adding support for multiple overlay callbacks

Bug: 193244407
Test: Presubmit
Change-Id: Ic345972056752238e7e46226533fd8f33d664213

src_plugins/com/android/systemui/plugins/shared/LauncherOverlayManager.java

@@ -93,6 +93,6 @@ public interface LauncherOverlayManager extends Application.ActivityLifecycleCal
 
     interface LauncherOverlayCallbacks {
 
-        void onScrollChanged(float progress);
+        void onOverlayScrollChanged(float progress);
     }
 }