The activity manager now pushes the idle/active state
down in to the power manager. The power manager now
tracks a structure of data about each uid: how many
wake locks it holds, whether it is active, and (as before)
its current process state.
Now when apps are inactive, we always disable wake locks
they hold, regardless of the system's device idle or
other state.
Test: none
Change-Id: I2cd4077e4d8a8572525406ae9747f0a2435764da
d33c7cd87a