Fix FragmentManager.FragmentLifecycleCallbacks scope

Static class is much more useful here.

Bug: 32938039
Test: n/a
Change-Id: I1cc10928ac79139de6cc09efba63a4b056666c32
(cherry picked from commit 1b5b6c012765919f50bfb64dcf494a2d8cfcfbb1)
3 files changed