SettingsProvider: Initialize defaults for CM features

Add configuration defaults for:
- status bar notification count
- QuickSettings quick pulldown
- lockscreen targets

Change-Id: Ief4b97fcceea7e351a13d59136a2fb1823d97b04
Merge "SettingsProvider: Initialize defaults for CM features" into cm-10.1
Merge remote branch 'cm/cm-10.1' into cm-10.1