Support plain QNX in mm-renderer mediaplayer impl

On plain QNX, the native events are plain screen_event_t's,
instead of being wrapped in bps_event_t.

The bps/mm-renderer interface isn't available on QNX, thus
those parts are replaced by reading directly from mm-renderer's
PPS objects.

Change-Id: I38772ddad04432ff099455a730ce0034f07db70d
Reviewed-by: Thomas McGuire <thomas.mcguire@kdab.com>

src/plugins/plugins.pro

@@ -12,11 +12,8 @@ android {
    SUBDIRS += android opensles
 }
 
-blackberry {
-    SUBDIRS += blackberry
-}
-
 qnx {
+    SUBDIRS += blackberry
     SUBDIRS += audiocapture qnx
 }