Revert "Immersive: Fix black bar in some games"

This reverts commit abe706ae28b661771284996db29238355bf32f03.
Block application install from unknown sources through adb

adb install command  doesn't check source of an application.

This change enforces that adb install command only works if user has
download/install from unknown sources selected in settings app.

Change-Id: Id0d328d1dad36089802d6bec2f5d2f940e045c25