[ubports/focal] adapters/performance_booster: add more granularity in the modes, binder reliability & configurability
requested to merge personal/peat-psuwit/focal_-_performancebooster-sustain-and-binder-config into ubports/focal
Manual backport of !86 (merged) so that it can be tested easily on existing device ports.
@fredldotme could you please test if this version works for your purpose?