<UserEventLogging> Log app launches

b/26494415

1) Current Logger can capture taps from
- homescreen
- folder inside homescreen
- apps prediction
- all apps a-z
- tap from hotseat
2) Deprecate LauncherCallback methods that is no longer needed

Future CL.
3) Stats and Logger will be merged. Bundle used for Stats can be
replaced with LauncherLogProto
4) Logging anything else other than app launches

Change-Id: Id52eb615f66142017b5c490a220ce6654d325681

src/com/android/launcher3/LauncherCallbacks.java

@@ -54,20 +54,33 @@ public interface LauncherCallbacks {
      */
     public void onLauncherProviderChange();
     public void finishBindingItems(final boolean upgradePath);
-    public void onClickAllAppsButton(View v);
     public void bindAllApplications(ArrayList<AppInfo> apps);
+    public void onInteractionBegin();
+    public void onInteractionEnd();
+
+    /**
+     * Extension points for Gel Logging.
+     */
+    @Deprecated
+    public void onClickAllAppsButton(View v);
+    @Deprecated
     public void onClickFolderIcon(View v);
+    @Deprecated
     public void onClickAppShortcut(View v);
     @Deprecated
     public void onClickPagedViewIcon(View v);
+    @Deprecated
     public void onClickWallpaperPicker(View v);
+    @Deprecated
     public void onClickSettingsButton(View v);
+    @Deprecated
     public void onClickAddWidgetButton(View v);
+    @Deprecated
     public void onPageSwitch(View newPage, int newPageIndex);
+    @Deprecated
     public void onWorkspaceLockedChanged();
+    @Deprecated
     public void onDragStarted(View view);
-    public void onInteractionBegin();
-    public void onInteractionEnd();
 
     /*
      * Extension points for replacing the search experience