Update to 2.3.1.3

Update to 2.3.1.3
Update strings.xml
Update strings.xml
Update to 2.3.1.3

Update to 2.3.1.3
Update to 2.3.1.3

Update to 2.3.1.3
Update to 2.3.1.5
Merge branch 'master' of https://github.com/vipersaudio/viper4android_fx
Merge branch 'master' into cm-10.2

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Add add navigation drawer view switcher + cleanup

Drawer additions picked from Omnirom's DSP Manager:
https://gerrit.omnirom.org/#/c/3586/15