Android: Fix a possible crash in the file browser if attempting to show a file with no extension.

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/model/FileListItem.java

@@ -22,6 +22,7 @@ public class FileListItem implements Comparable<FileListItem>
 	public FileListItem(File file)
 	{
 		mPath = file.getAbsolutePath();
+		mFilename = file.getName();
 
 		if (file.isDirectory())
 		{
@@ -29,12 +30,22 @@ public class FileListItem implements Comparable<FileListItem>
 		}
 		else
 		{
-			String fileExtension = mPath.substring(mPath.lastIndexOf('.'));
+			String fileExtension = null;
 
-			// Extensions to filter by.
+			int extensionStart = mPath.lastIndexOf('.');
+			if (extensionStart < 1)
+			{
+				// Ignore hidden files & files without extensions.
+				mType = TYPE_OTHER;
+			}
+			else
+			{
+				fileExtension = mPath.substring(extensionStart);
+
+				// The extensions we care about.
 				Set<String> allowedExtensions = new HashSet<String>(Arrays.asList(".dff", ".dol", ".elf", ".gcm", ".gcz", ".iso", ".wad", ".wbfs"));
 
-			// Check that the file has an appropriate extension before trying to read out of it.
+				// Check that the file has an extension we care about before trying to read out of it.
 				if (allowedExtensions.contains(fileExtension))
 				{
 					mType = NativeLibrary.IsWiiTitle(mPath) ? TYPE_WII : TYPE_GC;
@@ -44,8 +55,7 @@ public class FileListItem implements Comparable<FileListItem>
 					mType = TYPE_OTHER;
 				}
 			}
-
+		}
-		mFilename = file.getName();
 	}
 
 	public int getType()