manifest-update couldn't work with non-ASCII.

when AndroidManifest.xml contains not-ASCII chars, manfiest-update could not work well. when packaging, it may be result error: Error parsing XML: not well-formed (invalid token). Try to fix it with proper encoding.
try to fix checkstyle error.
Merge pull request #322 from mccxj/master

manifest-update couldn't work with non-ASCII.