[Android] The webapp can be packed when the Manifest name with Tail Esca...

...pe Char BackSlash or Tail Unit Dollar

This patch is to resolve two problems:
1) A mistake, literal string '\/' doesn't include two chars '\' and '/'
   but only one '/'.
2) Need to add '$' into invalid chars set.

BUG=https://crosswalk-project.org/jira/browse/XWALK-1472