MediaFile: Fix case sensitive file extension matching for computing MTP format code

Bug: 6939136

Change-Id: Iefd4083aefbd4b175a2f8c860a9e13c99ded9c82
Signed-off-by: Mike Lockwood <lockwood@google.com>
diff --git a/media/java/android/media/MediaFile.java b/media/java/android/media/MediaFile.java
index d21ada4..06d43a2 100644
--- a/media/java/android/media/MediaFile.java
+++ b/media/java/android/media/MediaFile.java
@@ -325,7 +325,7 @@
         }
         int lastDot = fileName.lastIndexOf('.');
         if (lastDot > 0) {
-            String extension = fileName.substring(lastDot + 1);
+            String extension = fileName.substring(lastDot + 1).toUpperCase();
             Integer value = sFileTypeToFormatMap.get(extension);
             if (value != null) {
                 return value.intValue();