Use new observer before rebooting and shutting down.
Add some unit tests for unmount and shutdown code paths
Fix registering/unregistering part in MountService
Use ShutdownThread in PowerManager.reboot()
Add reboot support to ShutdownThread.
Remove MountService code from PowerManagerService.java and Power.java.
Clean shutdown/reboot is handled exclusively by ShutdownThread now.
Change-Id: Iefb157451d3d9c426cb431707b870a873c09123d
Capture stack traces from the system process using the same
mechanism as ANRs (which will initialize traces.txt, etc).
Also record the watchdog reset in the dropbox for uploading.
Bug: 2475557
We can now locate event log tag definitions in individual packages
(and java constants for the tag numbers get auto-generated), so move
all the tags used by the system server into the package.
Applications can now declare that they support small, normal, or
large screens. Resource selection can also be done based on these
sizes. By default, pre-Donut apps are false for small and large,
and Donut or later apps are assumed to support all sizes. In either
case they can use <supports-screens> in their manifest to declare
what they actually support.
