Initialize InputMethodSubtype with "languageTag".
My previous commit [1] introduced a new XML attribute "languageTag" for
subtypes but forgot to initialize InputMethodSubtype object with that
attribute. As a result, InputMethodSubtype#getLanguageTag() has always
returned null even if "languageTag" attribute is specified.
[1]: I77db5b99a7cf745d800db75baf135bb60ad04820
8d6eeb01df72891acd3aa75e64aa1595a41cc96e
With this CL, InputMethodSubtype#getLanguageTag() starts returning the
value specified in the XML resource.
Bug:
22859862
Change-Id: I251d3d999afd13c0d618f2cb59e8ed3d47f21c98