Only update mutable shortcuts.

When trying to update the flags for the existing shortcuts, check and
skip the immutable shortcuts, since they should not be modified.

Change-Id: Iee70ed92f45c1b0b0f0c5b902069c017acfa4990
Fixes: 119119713
Test: make RunSettingsRoboTests

src/com/android/settings/SettingsInitialize.java

@@ -128,6 +128,9 @@ public class SettingsInitialize extends BroadcastReceiver {
         final List<ShortcutInfo> pinnedShortcuts = shortcutManager.getPinnedShortcuts();
         final List<ShortcutInfo> updates = new ArrayList<>();
         for (ShortcutInfo info : pinnedShortcuts) {
+            if (info.isImmutable()) {
+                continue;
+            }
             final Intent shortcutIntent = info.getIntent();
             shortcutIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TOP);
             final ShortcutInfo updatedInfo = new ShortcutInfo.Builder(context, info.getId())