Make VpnProfile.maxMtu default value match Ikev2VpnProfile

This change corrects the VpnProfile's maxMtu defaults to match that of
the Ikev2VpnProfile. 1400 is too high as a default, and Settings will
run into an issue here quite often.

Bug: 152573931
Test: FrameworksNetTests passing
Change-Id: I97ba5903b3cc1ed6a21c706ed3d78bd8ecbeee0c
Merged-In: I97ba5903b3cc1ed6a21c706ed3d78bd8ecbeee0c
(cherry picked from commit d0a44f49df01a1aefa505ee90c9806dee135b4e4)
1 file changed
tree: e51f63758fc760ffee26d6e119e498dea55dcc7d
  1. core/
  2. services/
  3. tests/