Add NATIVE_WINDOW_CONSUMER_IS_PROTECTED enum

The enum is being introduced into libnativewindow, but back ported here
since window-deprecated.h is still being depended by other system
componenets.

Bug: 35726763
Test: videoplayer-nodrm-protected.apk and videoplayer-drm-protected.apk
both works.

Change-Id: I9298ff9b1ddd7f868e59db41e1a84e2cdd3d02b5

libsystem/include/system/window-deprecated.h

@@ -334,6 +334,12 @@ enum {
      * present info, 0 if it won't.
      */
     NATIVE_WINDOW_FRAME_TIMESTAMPS_SUPPORTS_PRESENT = 18,
+
+    /*
+     * The consumer end is capable of handling protected buffers, i.e. buffer
+     * with GRALLOC_USAGE_PROTECTED usage bits on.
+     */
+    NATIVE_WINDOW_CONSUMER_IS_PROTECTED = 19,
 };
 
 /* Valid operations for the (*perform)() hook.