[Android] Support package file name including space character.

If package file name includes space character, this character
will be replaced with '_', according to the new user requirement,
blank character should be supported, this fix resolves this issue
by removing the space from the invalid characters.

BUG=https://crosswalk-project.org/jira/browse/XWALK-1006
Merge pull request #1602 from ShDavidliu/UpdatePackageName

[Android] Support package file name including space character.