#UPDATE: (1) Update the AndroidStringXML_PrivateStringResourcesWriterTest.java unit test. (2) Some minor update.
#ADD (1) Create the Utility.java and its init test. (2) Move the lib java to the new unitestLibs package. (3) Some minor updates.
#UPDATE: Update the IStringResourcesProvider interface.
#UPDATE: Complete the AndroidStringXML class but not yet the unit test.