Refactors in UserEventDispatcher

- LaunchSource -> LogContainer

Change-Id: I71bfee992fb1ba7ae80e824d419f7bf8d3020999
diff --git a/src/com/android/launcher3/Hotseat.java b/src/com/android/launcher3/Hotseat.java
index f9424d4..11d6b50 100644
--- a/src/com/android/launcher3/Hotseat.java
+++ b/src/com/android/launcher3/Hotseat.java
@@ -42,7 +42,7 @@
 import com.android.launcher3.userevent.nano.LauncherLogProto.Target;
 
 public class Hotseat extends FrameLayout
-        implements UserEventDispatcher.LaunchSourceProvider {
+        implements UserEventDispatcher.LogContainerProvider {
 
     private CellLayout mContent;
 
@@ -172,7 +172,7 @@
     }
 
     @Override
-    public void fillInLaunchSourceData(View v, ItemInfo info, Target target, Target targetParent) {
+    public void fillInLogContainerData(View v, ItemInfo info, Target target, Target targetParent) {
         target.gridX = info.cellX;
         target.gridY = info.cellY;
         targetParent.containerType = LauncherLogProto.HOTSEAT;