Revert "Multiple resumed activities"

This reverts commit 5bca8b8c25e8a944daab643b4fbf3c51662cd385.

Reason for revert: b/123166999

Change-Id: Ie0f29213d314159c55c487d7afbd7417db537fe0
(cherry picked from commit f2d3f7425d633526c1133da98ccb5a987f3dee16)
10 files changed