display: Add binder interface to pause/resume WFD

- Client can call this when it want to pause/resume wfd
- Calling this will make sure after pause, black screen
  is shown on the sink
- Currently used by the SecureDisplay module

Change-Id: If618edf76a82abe49fb676d3845ca1f1d5a8bf25
diff --git a/libhwcomposer/hwc_utils.h b/libhwcomposer/hwc_utils.h
index cd84f73..c166669 100644
--- a/libhwcomposer/hwc_utils.h
+++ b/libhwcomposer/hwc_utils.h
@@ -1,6 +1,6 @@
 /*
  * Copyright (C) 2010 The Android Open Source Project
- * Copyright (C)2012-2013, The Linux Foundation. All rights reserved.
+ * Copyright (C)2012-2014, The Linux Foundation. All rights reserved.
  *
  * Not a Contribution, Apache license notifications and license are retained
  * for attribution purposes only.
@@ -255,6 +255,10 @@
 // BufferMirrirMode(Sidesync)
 int getMirrorModeOrientation(hwc_context_t *ctx);
 
+// Handles wfd Pause and resume events
+void handle_pause(hwc_context_t *ctx, int dpy);
+void handle_resume(hwc_context_t *ctx, int dpy);
+
 //Close acquireFenceFds of all layers of incoming list
 void closeAcquireFds(hwc_display_contents_1_t* list);