Allow Launcher class to hide activities from All Apps

There are a few questions for the launcher team
embedded in comments.

Bug: 10645210
Bug: 10551568
Change-Id: I67ad10da0d0f0f0885f8b14d329231c37aa6779b
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index ec84a9a..bdd9add 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -45,6 +45,7 @@
 import android.content.pm.ActivityInfo;
 import android.content.pm.PackageManager;
 import android.content.pm.PackageManager.NameNotFoundException;
+import android.content.pm.ResolveInfo;
 import android.content.res.Configuration;
 import android.content.res.Resources;
 import android.database.ContentObserver;
@@ -3907,6 +3908,11 @@
         }
     }
 
+    @Override
+    public boolean shouldShowApp(ResolveInfo app) {
+        return true;
+    }
+
     /**
      * A package was updated.
      *