[TIMOB-28176] Android: createTempDirectory() does not create a directory

*Summary:* The [Ti.Filesystem.createTempDirectory()](https://docs.appcelerator.com/platform/latest/#!/api/Titanium.Filesystem-method-createTempDirectory) method does not create the referenced directory by default on Android. It correctly returns a Ti.Filesystem.File object referencing a new directory, but the Titanium developer is forced to create it manually afterwards, which doesn't match iOS' behavior or what's implied by the method name. *Steps to reproduce:*

Build and run the below on Android.

Notice in the log that "exists" returns false. _(This is the bug.)_

var tempDir = Ti.Filesystem.createTempDirectory();
console.log("@@@ nativePath: " + tempDir.nativePath);
console.log("@@@ exists: " + tempDir.exists());

*Note:* Android should also be changed to create the temp directory under the Ti.Filesystem.tempDirectory like iOS. Currently, Android puts the temp directory in a radically different location that Titanium does not offer a directory constant for. *Work-Around:* You must create the directory manually like the below.

var tempDir = Ti.Filesystem.createTempDirectory();
if (OS_ANDROID) {
	tempDir.createDirectory();
}
console.log("@@@ exists: " + tempDir.exists());