- Add death listener to clean-up drmserver appropriately
when drmserver died.
- Remove "static" declaration of mUniqueIdVector because it was not
needed to be static variable.
- Remove "class DrmContentIds;" because the class does not exist.
- contentPath in saveRights() could be empty because
it is not required by some DRM schemes.
- Fix naming convention to use sXXX for static variables.
- Fix typo
Change-Id: I7d440488fc074c200f1009d1bafafeffebd690b2
5c96c65f69