Fix issue with loading all apps.

- when we navigate across multiple pages that access the app state
session, the resumed state for the session may become incorrect, which
leads to things that depends on the flag not being run properly. In
onResume(), first force pause the session, so that it will be in the
correct paused state so that the resume tasks will be run.

Change-Id: I6c27c98226a8e0fe99d9b80f1f4297c45a49b612
Fixes: 113272571
Test: manual