Allow onActivityResult(...) to be dispatched to nested Fragments.

This fixes https://code.google.com/p/android/issues/detail?id=40537
by allowing onActivityResult(...) calls to be dispatched to the
correct Fragment even if it is nested in another Fragment.

Change-Id: I4b80c2eb1a83de93b95cb26feca5052aa55c9961
4 files changed