Read-only version of the configuration screen for
Limited Interruptions. Defaults to the logic implemented
for this mode, namely block notifications except for
Calls & Alarms.
This settings panel will serve as a target for the
configure affordance in SystemUI.
Change-Id: I33fd1e11ab76dbb7044bb94cb096cd892945947d
Step 1: Surface zen mode value under sound settings.
This is in keeping with the principle that quick settings are
accelerators (not replacements) for settings in the Settings app.
Adding configuration to "Limited interruptions" will be done as
a followup, and will serve as the target for the configuration
icon in SystemUI.
Change-Id: Ia2c7351454b17df3e27926ff593eebff284ebef8