Merge pull request #5 from slovx2/interface

Add a sample to show how to invoke host method from plugin
Merge pull request #6 from slovx2/interface

Support more lifecycle method
optimize classloader,add about,code format,add license file.
move LICENSE
extract dexclassloader,support load different apk
delete useless code

Change-Id: I40d32a70809feeaea77a0e23b9cd5a381b1265ff