CDD: Add new sections for power-saving modes and accounting

The algorithms of the power-saving modes, in Android 6.0,
are mainly implemented within the DeviceIdleController class.

If the algorithm varies across devices, the app developers will
not have a reliable method to tune the experience of their apps
under the power-saving modes.

Bug: 19324406
Bug: 23760090

Change-Id: I28611e8b5780a1871743237043756f6b619161c6
1 file changed