Telemetry / Android: Fix supports_tab_control for Android browsers.

The current browser backend implementation is relying on the chrome
branch number to determin whether or not the target browser supports
tabs. This methodology has introduced bugs in the past, as it is
likely to break again whenever the user agent string for an Android
browser will change.
This change strives to make the supports_tab_control more reliable.

BUG=251008

Review URL: https://codereview.chromium.org/24704004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@230452 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 230452