[android] Remove unnecessary install of AndroidWebViewTest.apk on bots.

BUG=None
TEST=None
NOTRY=True

Review URL: https://chromiumcodereview.appspot.com/24076020

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@225033 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 225033