Adds the concept of Game State (supplied by the application) to the
GameManager API. This allows the setting of various modes to describe
the current high-level runtime state of the game, as well as the loading
state. In Performance Mode, during loading a hint is sent to the device
PowerHAL via the PowerManager.
Bug: 201769701
Test: atest android.gamemanager.cts.GameManagerTest
Ignore-AOSP-First: Mentions a confidential API
Change-Id: I695e45b12f9a30c1824df210bfefbd5a9b4bd935
620c5cccd1