Because we restrict the window type used for live lock screens to
only one instance, we need to know when the current one is detached
so that a new one can be added.
Change-Id: I55cf79a8eeb962b53c01014ec97373403cd073b6
Adds an interface for the KeyguardExternalViewProviderService to
communicate with the host in SystemUI. This includes handling
notifying the host when the provider service has died.
Change-Id: Icd185da289913b84da09707f1d8a2f4f4ff86bae
Danesh M