Work on process management.

Introduce a new concept of "B" services.  All running services are
classified as either A or B.  B services are later in the LRU list.
Their oom_adj is after the home app.  This allows us to better pick
services to kill based on how long they have running, and should
reduce the amount that we end up killing the home app.

This temporarly turns on a debug log when the oom_adj of a process
is changed.  Sorry, I know it is noisy.  This is needed to try to
track down why some processes are being killed.

Also add a flag to the SyncManager's service binding to allow the
syncing process to be more aggressively killed if it has done UI.
This is to address cases we have seen where sync is causing an 80MB
gmail process to be kept around, preventing other process from running.
Now what will happen is that the syncing process will aggressively be
killed by the system, and can then be restarted in a much lighter-weight
state.

Do a little tweak in the power manager to allow us to still do smooth
brightness changes even when the fancy TV off animation is in use.

And get rid of a debug log in the window manager that was accidentally
left in.

Change-Id: I64a8eeaaa1f096bab29c665fbff804c7f1d029e2

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