Add missing @addtogroup tags.

These NDK docs weren't in any groups, so they don't show up in the
new site.

Test: https://irina-dot-devsite.googleplex.com/ndk/reference/group/media
Bug: Bug: http://b/77236573
Change-Id: Ie01f4387618bc36706683d684f0b97eb27a1c951
diff --git a/media/ndk/include/media/NdkMediaCodec.h b/media/ndk/include/media/NdkMediaCodec.h
index 144de2d..33cd7af 100644
--- a/media/ndk/include/media/NdkMediaCodec.h
+++ b/media/ndk/include/media/NdkMediaCodec.h
@@ -14,6 +14,15 @@
  * limitations under the License.
  */
 
+/**
+ * @addtogroup Media
+ * @{
+ */
+
+/**
+ * @file NdkMediaCodec.h
+ */
+
 /*
  * This file defines an NDK API.
  * Do not remove methods.
@@ -366,3 +375,5 @@
 __END_DECLS
 
 #endif //_NDK_MEDIA_CODEC_H
+
+/** @} */
diff --git a/media/ndk/include/media/NdkMediaCrypto.h b/media/ndk/include/media/NdkMediaCrypto.h
index d31dbdc..6f2926e 100644
--- a/media/ndk/include/media/NdkMediaCrypto.h
+++ b/media/ndk/include/media/NdkMediaCrypto.h
@@ -14,6 +14,14 @@
  * limitations under the License.
  */
 
+/**
+ * @addtogroup Media
+ * @{
+ */
+
+/**
+ * @file NdkMediaCrypto.h
+ */
 
 /*
  * This file defines an NDK API.
@@ -54,3 +62,5 @@
 __END_DECLS
 
 #endif // _NDK_MEDIA_CRYPTO_H
+
+/** @} */
diff --git a/media/ndk/include/media/NdkMediaDrm.h b/media/ndk/include/media/NdkMediaDrm.h
index 9e9f4c3..d45dc20 100644
--- a/media/ndk/include/media/NdkMediaDrm.h
+++ b/media/ndk/include/media/NdkMediaDrm.h
@@ -14,6 +14,15 @@
  * limitations under the License.
  */
 
+/**
+ * @addtogroup Media
+ * @{
+ */
+
+/**
+ * @file NdkMediaDrm.h
+ */
+
 /*
  * This file defines an NDK API.
  * Do not remove methods.
@@ -451,3 +460,5 @@
 __END_DECLS
 
 #endif //_NDK_MEDIA_DRM_H
+
+/** @} */
diff --git a/media/ndk/include/media/NdkMediaError.h b/media/ndk/include/media/NdkMediaError.h
index da61b64..7afb681 100644
--- a/media/ndk/include/media/NdkMediaError.h
+++ b/media/ndk/include/media/NdkMediaError.h
@@ -14,6 +14,14 @@
  * limitations under the License.
  */
 
+/**
+ * @addtogroup Media
+ * @{
+ */
+
+/**
+ * @file NdkMediaError.h
+ */
 
 /*
  * This file defines an NDK API.
@@ -66,3 +74,5 @@
 __END_DECLS
 
 #endif // _NDK_MEDIA_ERROR_H
+
+/** @} */
diff --git a/media/ndk/include/media/NdkMediaExtractor.h b/media/ndk/include/media/NdkMediaExtractor.h
index bf0e46d..ad8f9da 100644
--- a/media/ndk/include/media/NdkMediaExtractor.h
+++ b/media/ndk/include/media/NdkMediaExtractor.h
@@ -14,6 +14,14 @@
  * limitations under the License.
  */
 
+/**
+ * @addtogroup Media
+ * @{
+ */
+
+/**
+ * @file NdkMediaExtractor.h
+ */
 
 /*
  * This file defines an NDK API.
@@ -163,3 +171,5 @@
 __END_DECLS
 
 #endif // _NDK_MEDIA_EXTRACTOR_H
+
+/** @} */
diff --git a/media/ndk/include/media/NdkMediaFormat.h b/media/ndk/include/media/NdkMediaFormat.h
index 018ab76..6c01d35 100644
--- a/media/ndk/include/media/NdkMediaFormat.h
+++ b/media/ndk/include/media/NdkMediaFormat.h
@@ -14,6 +14,15 @@
  * limitations under the License.
  */
 
+/**
+ * @addtogroup Media
+ * @{
+ */
+
+/**
+ * @file NdkMediaFormat.h
+ */
+
 /*
  * This file defines an NDK API.
  * Do not remove methods.
@@ -110,3 +119,5 @@
 __END_DECLS
 
 #endif // _NDK_MEDIA_FORMAT_H
+
+/** @} */
diff --git a/media/ndk/include/media/NdkMediaMuxer.h b/media/ndk/include/media/NdkMediaMuxer.h
index 1ecd1ca..dc9e0ac 100644
--- a/media/ndk/include/media/NdkMediaMuxer.h
+++ b/media/ndk/include/media/NdkMediaMuxer.h
@@ -14,6 +14,14 @@
  * limitations under the License.
  */
 
+/**
+ * @addtogroup Media
+ * @{
+ */
+
+/**
+ * @file NdkMediaMuxer.h
+ */
 
 /*
  * This file defines an NDK API.
@@ -118,3 +126,5 @@
 __END_DECLS
 
 #endif // _NDK_MEDIA_MUXER_H
+
+/** @} */