SystemUI: QuietHours Shortcut

Enables QuietHours to be toggled via
    other applications

PS2: Big AOSP guidelines rework
PS3: Forgot to rename class
PS4: Ribbons Class in same package
    Was already using "QuietHoursToggle"
    So a rename was required

Change-Id: I5797b7aba834f0f219683e8a5acc3eabde15aa8c
Meant to revert this before pushing it BUT better late then never...lol

This reverts commit 3f324271dec22281f28032d384c2cf09b4bcea3c.