Making the parseAndAddDeepShortcut api private.

There is no need to expose this api. Missed the comment https://googleplex-android-review.git.corp.google.com/c/platform/packages/apps/Launcher3/+/17956680/comments/1c9b7443_cc54296d

Test: Tested manually on device.
Change-Id: If71e203f32a59fa59c406303411a37cba7b6c62e
diff --git a/src/com/android/launcher3/DefaultLayoutParser.java b/src/com/android/launcher3/DefaultLayoutParser.java
index d8fba8b..4daca8b 100644
--- a/src/com/android/launcher3/DefaultLayoutParser.java
+++ b/src/com/android/launcher3/DefaultLayoutParser.java
@@ -208,7 +208,7 @@
          * This method parses and adds a deep shortcut.
          * @return item id if the shortcut is successfully added else -1
          */
-        public int parseAndAddDeepShortcut(String shortcutId, String packageName) {
+        private int parseAndAddDeepShortcut(String shortcutId, String packageName) {
             try {
                 LauncherApps launcherApps = mContext.getSystemService(LauncherApps.class);
                 launcherApps.pinShortcuts(packageName, Collections.singletonList(shortcutId),