Ensuring that we always update the predicted apps set.

Change-Id: Ieecf019442dcf4af42463ed6cbc4cdcd19468dec
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index 77c4540..847b29b 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -3427,7 +3427,7 @@
     private void tryAndUpdatePredictedApps() {
         if (mLauncherCallbacks != null) {
             List<ComponentKey> apps = mLauncherCallbacks.getPredictedApps();
-            if (!apps.isEmpty()) {
+            if (apps != null) {
                 mAppsView.setPredictedApps(apps);
             }
         }