Modular DRM for MediaPlayer: L3 playback fails at OMX mmap; preparDrm preparing

Bug: 34559906
Bug: 38390836
Bug: 38039230
Bug: 62194380

Test: GTS Tests
Change-Id: I51e2479f745a4c3e271628abdd79efcb97368ec2
diff --git a/media/libmediaplayerservice/nuplayer/NuPlayerSource.h b/media/libmediaplayerservice/nuplayer/NuPlayerSource.h
index e7cca27..8ba9c0d 100644
--- a/media/libmediaplayerservice/nuplayer/NuPlayerSource.h
+++ b/media/libmediaplayerservice/nuplayer/NuPlayerSource.h
@@ -38,8 +38,8 @@
         FLAG_CAN_SEEK_FORWARD   = 4,  // the "10 sec forward button"
         FLAG_CAN_SEEK           = 8,  // the "seek bar"
         FLAG_DYNAMIC_DURATION   = 16,
-        FLAG_SECURE             = 32,
-        FLAG_PROTECTED          = 64,
+        FLAG_SECURE             = 32, // Secure codec is required.
+        FLAG_PROTECTED          = 64, // The screen needs to be protected (screenshot is disabled).
     };
 
     enum {