Pin messaging to use Jack with 1.7 language

There is a bug in the current version of Jack
that causes problems when the default is changed to
1.8. Pinning to 1.7 appears to help.

Bug: 27305482
Bug: 26753820
(cherry picked from commit 445d7baabc65ffec355e47d0452bafa0f6804923)

Change-Id: I178ef57bc29cb49064db08d06d501d6aed09c26f
1 file changed