Handle unsupported schema case better

 Bug: 3442811 3443962
 Fix it so that the check for specialized handlers takes into
 account whether or not webkit can even handle the schema. If it
 can't handle the schema, we always want to call startActivity

Change-Id: Ib7667f9fe6c3ea0602ccc1fdfce09b5920757a63
1 file changed