A regression was introduced when trying to limit the number of
internal synchronization generation IDs that caused RCC
information to be shown only for applications that requested
audio focus after media button receiver and RCC registration,
(such as Play Music), not for applications that requested focus
first (such as Play Movies).
The correct behavior is to always check and update the
RemoteControllers (seen by MediaFocusControl as RCD interfaces)
whenever a RemoteControlClient is registered (even if it's a
re-registration) when it is associated when an entry at the top
of the remote control stack.
Bug 11657655
Change-Id: I30716e2028f7f718a31e13401b191178735229ff
320ad9fa1d