Revert "SystemUI: don't show eq tile while casting"

Does not work as intended.

This reverts commit 72dc45fb1b219aafa1d4b2fe62d144739ae4a552.

Change-Id: Ifd40c70c45b038983145369287a6dae177ac0a4c
frameworks: add persistent notification when USB OTG is connected

Tapping the notification will take the user into Storage settings, and
highlight the 'Unmount' option.

Change-Id: I650f3874a8295b2b8ffdaef78aff4b68e9cd574e
Signed-off-by: Roman Birg <roman@cyngn.com>