base

Change PacProcessor to Android Service

This switches the PacProcessor over to an Android Service.  The service
is bound and unbound by the PacManager, which also adds it to the
ServiceManager, allowing for Context-Free access by the PacProxySelector
in all DVMs.

bug:10182711
Change-Id: Id1ff7660be56e8976cdcccd76e041feb47a17a61