Adding pause video support to Abtract YouTube app helper.

New function interface: pauseVideo

Change-Id: Icb2022e0659bcf2e362c8ead8315fb4b484bfa58
diff --git a/libraries/base-app-helpers/src/android/platform/test/helpers/AbstractYouTubeHelper.java b/libraries/base-app-helpers/src/android/platform/test/helpers/AbstractYouTubeHelper.java
index aa0c641..4cbb512 100644
--- a/libraries/base-app-helpers/src/android/platform/test/helpers/AbstractYouTubeHelper.java
+++ b/libraries/base-app-helpers/src/android/platform/test/helpers/AbstractYouTubeHelper.java
@@ -113,6 +113,13 @@
     /**
      * Setup expectations: YouTube is on the video player page.
      *
+     * This method pauses the video if it is playing.
+     */
+    public abstract void pauseVideo();
+
+    /**
+     * Setup expectations: YouTube is on the video player page.
+     *
      * This method resumes the video if it is paused.
      */
     public abstract void resumeVideo();