am ae000a47: am ac551c10: Fix MMS to work with GoogleVoice
Deprecated language codes leaked in HTTP_ACCEPT_LANGUAGE header

Some old language codes, such as Hebrew (iw), were inserted in the
HTTP_ACCEPT_LANGUAGE header. Fix the problem using the same strategy
as in the browser code: replace deprecated language codes with the
new ones. Added a unit test that tests for standard behavior and tests
one of the deprecated languages. Bug 2600706.

Change-Id: I5ac29618c9c7f5cbbafdb24c43367c983647eaa8
Merge commit 'c122ca5ebd2ccac240002425a567718a9577568c' into oxygen_4.3

* commit 'c122ca5ebd2ccac240002425a567718a9577568c':
  Deprecated language codes leaked in HTTP_ACCEPT_LANGUAGE header