Minor changes and cleanup to support EXT_protected_content.

Bug: 22775237
Change-Id: I809b62597ca439e5183c32711866efa71e06467e
diff --git a/opengl/include/EGL/eglext.h b/opengl/include/EGL/eglext.h
index 5d838e6..b1f51f7 100644
--- a/opengl/include/EGL/eglext.h
+++ b/opengl/include/EGL/eglext.h
@@ -602,8 +602,8 @@
 #define EGL_ANDROID_create_native_client_buffer 1
 #define EGL_NATIVE_BUFFER_USAGE_ANDROID   0x3143
 #define EGL_NATIVE_BUFFER_USAGE_PROTECTED_BIT_ANDROID   0x00000001
-#define EGL_NATIVE_BUFFER_USAGE_RENDERBUFFER_ANDROID   0x00000002
-#define EGL_NATIVE_BUFFER_USAGE_TEXTURE_ANDROID   0x00000004
+#define EGL_NATIVE_BUFFER_USAGE_RENDERBUFFER_BIT_ANDROID   0x00000002
+#define EGL_NATIVE_BUFFER_USAGE_TEXTURE_BIT_ANDROID   0x00000004
 #ifdef EGL_EGLEXT_PROTOTYPES
 EGLAPI EGLClientBuffer eglCreateNativeClientBufferANDROID (const EGLint *attrib_list);
 #else