Tapl library

The public API of the library has finalized; flakiness has been removed;
code polished.

Bug: 110103162
Test: TaplTests suite
Change-Id: Ic156bbfeedb1cb9c4a48ef907f97e396e8e81936

src/com/android/launcher3/Utilities.java

@@ -16,6 +16,7 @@
 
 package com.android.launcher3;
 
+import android.app.ActivityManager;
 import android.app.WallpaperManager;
 import android.content.ComponentName;
 import android.content.Context;
@@ -130,6 +131,9 @@ public final class Utilities {
             CORE_POOL_SIZE, MAXIMUM_POOL_SIZE, KEEP_ALIVE,
             TimeUnit.SECONDS, new LinkedBlockingQueue<Runnable>());
 
+    public static final boolean IS_RUNNING_IN_TEST_HARNESS =
+                    ActivityManager.isRunningInTestHarness();
+
     public static boolean isPropertyEnabled(String propertyName) {
         return Log.isLoggable(propertyName, Log.VERBOSE);
     }