staging: android: binder: global variable cleanup.

Replaced a manual hlist_head declaration with a macro based one.
Also reorganized the globals to be grouped better.

Signed-off-by: Daniel Walker <dwalker@fifo99.com>
Cc: Brian Swetland <swetland@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>