Migrate DBus service constants from flimflam namespace to shill namespace.

All shill DBus service constants have been moved from the flimflam namespace to
the shill namespace. This CL makes the corresponding changes on the Chrome
side.

Related CLs:
  https://chromium-review.googlesource.com/#/c/170123/
  https://chromium-review.googlesource.com/#/c/170205/
  https://chromium-review.googlesource.com/#/c/170206/
  https://chromium-review.googlesource.com/#/c/170207/
  https://chromium-review.googlesource.com/#/c/170208/
  https://chromium-review.googlesource.com/#/c/170209/
  https://chromium-review.googlesource.com/#/c/170223/
  https://chromium-review.googlesource.com/#/c/170230/
  https://chromium-review.googlesource.com/#/c/170231/

BUG=295425
R=nkostylev@chromium.org,dpolukhin@chromium.org,stevenjb@chromium.org

Review URL: https://chromiumcodereview.appspot.com/24334003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@224939 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 224939
[android] Disable 3 failing accessibility-related content browsertests.

BUG=297230
TEST=None
NOTRY=True

Review URL: https://chromiumcodereview.appspot.com/24334008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@224940 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 224940