Currently, the launch boost perflock is held for a fixed duration, either
specified in perfboostsconfig.xml for perf HAL platforms or hardcoded in the
powerHAL for non-perf HAL platforms.
Using a fixed duration for this perflock has two shortcomings:
* perflock can be held for too long, causing the CPU freq and other resources
to be boosted for too long even if the application has finished launching,
resulting in excessive battery drainage
* perflock can be held not long enough if it takes more than the timeout
time to finish launch
The framework sends out a powerhint for both when launch starts and when
launch ends. The launch finish hint can be used to signal when to release the
perflock.
Reference: Wahoo power-libperfmgr
Change-Id: I405cc453c5f58d9fb2583b9c6017f3964a0ce024
607158687a