Always call out to KeyguardHostView when something in our state changes.

KeyguardHostView already takes care to not add or remove the transport
control twice.
This should hopefully fix some conditions where the transport control
was still being shown although the media player already abandoned audio
focus.

Change-Id: Ib4577cdbfcea0a89efbbd0df70646afe8e677e0d
Fixes for clang:
String16 is contained in the android namespace. Do not namespace prefix it
within the android namespace.
Explicitly specify which std classes are necessary to prevent ambiguous
type errors. (map, set)

Change-Id: I0d01477a976e770821ebae8847f8d11b132a15d6
Revert "Auto-close if you swipe away the last notification."

This reverts commit 8cc36e572876f3bb9197f0109db3042466e5f917.

It didn't work as advertised anyway: It only worked if there are no
persistent notifications, and it also closes the notification area if
the notification is closed by the app itself.

Change-Id: I16f0fb6cf41d20c3a3bd4278446edab780c1fc77
Merge pull request #20 from PAC-man/cm-10.1

Cm 10.1