This should save some memory on devices with limited amounts of RAM
by allowing it to share the graphics context with systemui.
Initially, adding this to the systemui process triggered a bug where
the shared process id didn't exist in the table yet. The change to
ActiveServices tries to work around this by explicitly adding the package in
attachApplicationLocked().
Change-Id: I9e97d5d69ddd15d7f16aca83a57bdf381811a13b
9512953c66