Doc change: cherrypick testing changes from master. Squashed commit of the following:

commit 3341f42f857058707c1c9f77dcfaecb22ff2f125
Author: Joe Malin <jmalin@google.com>
Date:   Wed Sep 1 14:43:24 2010 -0700

    Doc Change: cherrypick from master -- add screenshots to Testing in Eclipse topic

    Change-Id: If0ebd70ece3f077e18c909db2b8cc499a7f92692

commit af2da09a6c69cac02fd1987a44d223d678b2484d
Author: Dirk Dougherty <ddougherty@google.com>
Date:   Sun Oct 10 12:39:55 2010 -0700

    Doc change: Cherrypick from master -- Testing Documentation in the Dev Guide tab

    Conflicts:

    	docs/html/guide/guide_toc.cs
    	docs/html/guide/topics/testing/testing_android.jd

    Change-Id: I6d2e7b7f69517e8aae3a1274596d2ecbd85cac50

Change-Id: Ic6e547ce25c35060ec073b9da75e1d71b4946a85