Make surround and aatube level adjustable

Hook cut frequency to menu for Android port. Replaygain preamp can now
have real time effect.

Change-Id: If83ceba7ceb2bb9d5c1a06f1af2bd66ed4d8a020
Apply tone control before replaygain to prevent major clipping after
changing replaygain

Change-Id: I9e5cf0be2610c60aa32144b655118dcaf9782fb8
Add Chinese translated strings for overdrive, aatube and surround

Change-Id: I51e4df07b6ffed473b49d48166ec13c2fe4aa66b