Use file extension based on MIME type

It uses the most common extension for the given MIME type.

Test: Manual

Change-Id: I3d4aea85fcd42088ed19898054db7225954d3401
Signed-off-by: Taesu Lee <taesu82.lee@samsung.com>

src/com/android/messaging/util/ContentType.java

@@ -168,6 +168,12 @@ public final class ContentType {
         return contentType;
     }
 
+    public static String getExtensionFromMimeType(final String mimeType) {
+        final MimeTypeMap mimeTypeMap = MimeTypeMap.getSingleton();
+        final String extension = mimeTypeMap.getExtensionFromMimeType(mimeType);
+        return extension;
+    }
+
     /**
      * Get the common file extension for a given content type
      * @param contentType The content type

src/com/android/messaging/util/FileUtil.java

@@ -21,7 +21,6 @@ import android.content.Context;
 import android.net.Uri;
 import android.os.Environment;
 import android.text.TextUtils;
-import android.webkit.MimeTypeMap;
 
 import com.android.messaging.Factory;
 import com.android.messaging.R;
@@ -62,9 +61,7 @@ public class FileUtil {
      *   actually creating the file.
      */
     public static File getNewFile(File directory, String contentType) throws IOException {
-        MimeTypeMap mimeTypeMap = MimeTypeMap.getSingleton();
-        String fileExtension = mimeTypeMap.getExtensionFromMimeType(contentType);
-
+        String fileExtension = ContentType.getExtensionFromMimeType(contentType);
         final Context context = Factory.get().getApplicationContext();
         String fileNameFormat = context.getString(ContentType.isImageType(contentType)
                 ? R.string.new_image_file_name_format : R.string.new_file_name_format);