Fixes for compressor and limiter thresholds and energy computation.

Fixed issue with FFT scaling and energy computation.
Added windowing compensation to energy computation.
Refactored FFT and stages computation to accomodate for linked limiters.
Added better logic for linked limiters computation.

Bug: 79712497
Test: manual testing and sound amplifier test
Change-Id: Ice16de3b6e21a4972e7667a71839478ef8b22c22