Make FilePathComponents internal, temporary disable tests of internal API

libraries/stdlib/test/io/Files.kt

@@ -182,9 +182,10 @@ class FilesTest {
         assertEquals(File("../../test"), File("test").relativeTo(File("dir/dir")))
     }
 
+/*
     private fun checkFilePathComponents(f: File, root: File, elements: List<String>) {
         assertEquals(root, f.root)
-        val components = f.filePathComponents()
+        val components = f.toComponents()
         assertEquals(root, components.root)
         assertEquals(elements, components.segments.map { it.toString() })
     }
@@ -209,25 +210,26 @@ class FilesTest {
         checkFilePathComponents(File("."), File(""), listOf("."))
         checkFilePathComponents(File(".."), File(""), listOf(".."))
     }
+*/
 
     @test fun fileRoot() {
         val rooted = File("/foo/bar")
         assertTrue(rooted.isRooted)
-        assertEquals("/", rooted.root.invariantSeparatorsPath)
+//        assertEquals("/", rooted.root.invariantSeparatorsPath)
 
         if (isBackslashSeparator) {
             val diskRooted = File("""C:\foo\bar""")
             assertTrue(rooted.isRooted)
-            assertEquals("""C:\""", diskRooted.rootName)
+//            assertEquals("""C:\""", diskRooted.rootName)
 
             val networkRooted = File("""\\network\share\""")
             assertTrue(networkRooted.isRooted)
-            assertEquals("""\\network\share""", networkRooted.rootName)
+//            assertEquals("""\\network\share""", networkRooted.rootName)
         }
 
         val relative = File("foo/bar")
         assertFalse(relative.isRooted)
-        assertEquals("", relative.rootName)
+//        assertEquals("", relative.rootName)
     }
 
     @test fun startsWith() {
@@ -273,6 +275,7 @@ class FilesTest {
         }
     }
 
+/*
     @test fun subPath() {
         if (isBackslashSeparator) {
             // Check only in Windows
@@ -283,6 +286,7 @@ class FilesTest {
         assertEquals(File("foo"), File("/foo/bar/gav/hi").subPath(0, 1))
         assertEquals(File("gav/hi"), File("/foo/bar/gav/hi").subPath(2, 4))
     }
+*/
 
     @test fun normalize() {
         assertEquals(File("/foo/bar/baaz"), File("/foo/./bar/gav/../baaz").normalize())