Add null pointer checks to fix NPEs

Bug: 6611233
Bug: 6685401

Change-Id: I804dfe0a7ad36b43168f7384ef88459d765fff6b

src/com/android/launcher2/InstallShortcutReceiver.java

@@ -169,6 +169,7 @@ public class InstallShortcutReceiver extends BroadcastReceiver {
                 if (intent.getAction() == null) {
                     intent.setAction(Intent.ACTION_VIEW);
                 } else if (intent.getAction().equals(Intent.ACTION_MAIN) &&
+                        intent.getCategories() != null &&
                         intent.getCategories().contains(Intent.CATEGORY_LAUNCHER)) {
                     intent.addFlags(
                         Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);