[Settings] Move display of VPN version into summary text

Move the display of version text within VPN into summary part of the
display, and limit the height of summary area.

Bug: 205460459
Test: install apk from b/205460459#comment3 and verify
Change-Id: I666b9db356feeebf04e3be688897c2d9110a5275
(cherry picked from commit 144f295d)
Merged-In: I666b9db356feeebf04e3be688897c2d9110a5275