Add CollegeDev's preferred credit; add missed PrivacyTelephonyRegistry

Also in frameworks/opt/telephony
Change 'warn' in ContextImpl to 'debug' logging to reduce annoying messages that don't cause problems.
Add additional constructors to Exceptions to allow message, and throwable, to be attached.
Added exception to error registering broadcast message in PrivacyTelephonyRegistry
Integrated getting the Privacy service as a static function in the PrivacyServiceManager class.
Added support for automatically attempting to reconnect to the service if the service connection drops.
Removed a lot of handling for the PrivacyServiceManager object being null, which is now not necessary due to the automatic reconnection and
getPrivacyService exception handling