ANDROID: Add metadata files. am: dcaf20a12f am: 537e880941 am: 6f9d363c13 am: e1c992cbab

Original change: https://android-review.googlesource.com/c/platform/external/libwebm/+/1504156

Change-Id: I933cf5b00fe54a27c0642cb6886b266e1231293b