Android: use List.sort() instead of Collections

The latter gives a warning.

Change-Id: I6c1a4ac5f1de3d9008a7d669506a4d2997a1d82b
Reviewed-by: Petri Virkkunen <[email protected]>

src/android/jar/src/org/qtproject/qt/android/QtApkFileEngine.java

@@ -198,7 +198,7 @@ static ArrayList<JFileInfo> getApkFileInfos(String apkPath)
             }
 
             // sort alphabetically based on the file path
-            Collections.sort(fileInfos, new Comparator<JFileInfo>() {
+            fileInfos.sort(new Comparator<JFileInfo>() {
                 @Override
                 public int compare(JFileInfo info1, JFileInfo info2) {
                     return info1.relativePath.compareTo(info2.relativePath);