Fix bad references in preloaded-classes

http://ag/352924 renamed INdefPushCallback
to IAppCallback. Update preloaded-classes
to reflect this.

This is a cherry-pick of Id552e94e3a01cdd61593480f3c0aedb32d185f80

Change-Id: I0901f14fb41f94e3c7572c09e090ec5903a878d1
1 file changed