Update process info while making activity visible

The top fullscreen activity converted to translucent while running
exit transition, which resulted in the activity below being visible.
Since the the process state of the activity below remained as
background, some operations required to be done as a foreground
(opening camera) was being rejected.

Bug: 162216572
Test: back to camera from filmstrip
Change-Id: Ib746f5a2c5409f142819f7eba89c7948c756c23e