dspmanager: Allow target to provide it's own replacement

 * We may want to have an external package which provides
   it's own effects configuration as well as the effects
   app itself. Add support for this.

Change-Id: Ifa39b171f3e13902781b91537c422697dc2d0228
DSPManager: Remove unused strings

Change-Id: I1355c80161ac0a005eae563f6b2bcf1dde21f192
Update icon to a more googley icon

Change-Id: I06c6fdbfe13abbd95e0264f36a870e2bfcd335c1
[2/3] Effects: Add center frequency param to bassboost

Change-Id: Ic082790010ed9e9abaf0e3249034322234119c66
[1/3] Effects: Add a stereo widening effect

Based on self knowledge.
Aside from the filter, a HighPass method has been
added to Biquad in the DSP library

Change-Id: I5dc8afa75cdf179c71ec38359887be9a5a60d4bd
DSPManager: Hide from launcher

Change-Id: Id641ee170a5da29ebc1017b4065d7df2aa0152c2