Grey out suspended applications.

Grey out application shortcuts and all apps entries
for packages that are suspended.

Bug: 22776761
Change-Id: I1b63da1816aca1de52b9f9bee62d1b162d0cdf4d

proguard.flags

@@ -70,3 +70,10 @@
   public float getBackgroundAlpha();
   public void setBackgroundAlpha(float);
 }
+
+# Proguard will strip new callbacks in LauncherApps.Callback from
+# WrappedCallback if compiled against an older SDK. Don't let this happen.
+-keep class com.android.launcher3.compat.** {
+  *;
+}
+