Make TitleMethodsTest a LangTestCase

With I40a51c14ce07c301c15c6c2128cc18bb12e71103 a compare of namespaces
was added which fails when content language is not en.

Change-Id: I21466231e10e6cd5969c8c9bfd4824bf9c47e6d8
Merge "Make TitleMethodsTest a LangTestCase"