Remove GetDefaultProfile from various Android related code

Trying to get rid of GetDefaultProfile since it was depricated since 2011. See https://docs.google.com/a/google.com/document/d/1Fo0_ixnmOYDZKjcdzU3btED3yWINpdBvzpgl7EBOZro/edit#heading=h.5pkgd9yd16w5 for more informations!

BUG=322682
TEST=covered by existing unit tests

Review URL: https://codereview.chromium.org/101653006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243456 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 243456
telemetry: extend key_silk_cases.json

BUG=310389
NOTRY=True

Review URL: https://codereview.chromium.org/117833002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243457 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 243457