Bring back two-line layout for status bar date.

Change-Id: I4bf7ce61b22da89b3b8c1a3f00e077461061f7b9
[1/2] Speed up booting on multicore devices.

1. Add multithreading support to Installer/installd.
2. Parallelize package scanning.
3. Parallelize boot dexopt.

Change-Id: Id42b2bf4a737f93f9ecd9b5819344adbb735f0fb

Conflicts:

	services/java/com/android/server/pm/PackageManagerService.java
PackageManager: Fix reconnection logic in Installer.

Change-Id: Id4b352647ed51aaf64bb85dff9030a25e295758f