Add support for retrieving location information in mp4/3gpp files

Change-Id: Ib8427704ef9ee5a4fa8fe1818c8a62d77b4ea687
related-to-bug: 5560253
diff --git a/include/media/mediametadataretriever.h b/include/media/mediametadataretriever.h
index 9aa6700..534afce 100644
--- a/include/media/mediametadataretriever.h
+++ b/include/media/mediametadataretriever.h
@@ -54,6 +54,7 @@
     METADATA_KEY_BITRATE         = 20,
     METADATA_KEY_TIMED_TEXT_LANGUAGES      = 21,
     METADATA_KEY_IS_DRM          = 22,
+    METADATA_KEY_LOCATION        = 23,
 
     // Add more here...
 };
diff --git a/include/media/stagefright/MetaData.h b/include/media/stagefright/MetaData.h
index 57f678c..4cdee17 100644
--- a/include/media/stagefright/MetaData.h
+++ b/include/media/stagefright/MetaData.h
@@ -85,6 +85,7 @@
     kKeyDate              = 'date',  // cstring
     kKeyWriter            = 'writ',  // cstring
     kKeyCompilation       = 'cpil',  // cstring
+    kKeyLocation          = 'loc ',  // cstring
     kKeyTimeScale         = 'tmsl',  // int32_t
 
     // video profile and level