Fix profile powermenu/cleanup keyguard whitespace
Remove phone window manager user value
Cleanup activity manager halo whitespace
Allow more hidden apps to stay in memory
Cleanup whitespace/remove unwanted import
Use old display metrics update methods
Cleanup battery service code style
Allow multiple emulated storages at the same time.

Only do multiuser mapping for primary emulated storage as per google docs.
Allow all non-primary emulated storage to have id other than 0 so that
it could be distinguished from the primary volume.

Change-Id: I7b70b9067fd6211055fb9074710f48107d7b0e8e
Cleanup more services whitespace
Cleanup halo notification manager service code
Cleanup final whitespace leftovers