Considering the previous uclamp.min value is the base of PID output.
Instead of:
`next_min = std::min(sUclampMinHighLimit, output);`
We should use:
`next_min = std::min(sUclampMinHighLimit, current_min + output);`
When session status entered stale state, set the uclamp to 0, but keep
the current_min. That would be helpful for boosting the heavy workload
of the first few frames.
Bug: 204444691
Test: build && manual test
Change-Id: Idb19e2bfd8e9522fae5fd452b1fcc58786e96e65
e395871686