fix PathServiceTest.Get test

[victorpasoshnikov]

Test was modified according to XBOX limitations

b/219026606

Change-Id: Iea811495b50fd29588ba439a955d9522672adb88

[victorpasoshnikov]

CL 226181

[kaidokert]

@TyHolc ping for a review / comments / thoughts ?

[TyHolc]

@TyHolc ping for a review / comments / thoughts ?

If we're sure this will be non-disruptive to other platforms by expanding the scope of "does this path exist" to include directories, then I'm fine with this.

An alternative could be:

#if defined(OS_WIN)
  if (dir_type == <LocalFolder> || dir_type == <LocalCacheFolder> || dir_type == <etc>...) {
    if (!DirectoryExists(path)) {
      return false;
    }
    check_path_exists = false;
  }
#endif

[TyHolc]

I'm going to leave this test disabled on Xbox for now and close this. Skipping this test with test filters for xbox is preferable to me over having all platforms skip checking their implementation of Get for their respective home directories.