MusicFX: DSPManager and MusicFX are mutually exclusive

Change-Id: I01cb80c45f7a99ccc00c92f116861a070a78d095
MusicFX: make it persistent and update to 1.5

Otherwise, MusicFX kills itself and stops using effects midway
through songs.

Change-Id: I69b992479d1005f072952d4b0226f623c46a0f9f
MusicFX: change name of app to Snapdragon Audio+

Change-Id: Ie6d8d5c4548e776b1fbbf59184d601de63c2bff3
MusicFX: set reverb max decay time to default 20000

Change-Id: I1739485ed81de1723381c59c74a6605f2e4f094c