display support + extra generic buttons

components/services/audio_controls.h

@@ -23,6 +23,7 @@
 // BEWARE: this is the index of the array of action below
 typedef enum { 	ACTRLS_NONE = -1, ACTRLS_VOLUP, ACTRLS_VOLDOWN, ACTRLS_TOGGLE, ACTRLS_PLAY, 
 				ACTRLS_PAUSE, ACTRLS_STOP, ACTRLS_REW, ACTRLS_FWD, ACTRLS_PREV, ACTRLS_NEXT, 
+				BCTRLS_PUSH, BCTRLS_UP, BCTRLS_DOWN, BCTRLS_LEFT, BCTRLS_RIGHT,
 				ACTRLS_MAX 
 		} actrls_action_e;
 typedef void (*actrls_handler)(void);