Removed irritating method and call

removed method 'initBufferMax'
This Method had no purpose at all because it always returned false, for the value for the key 'buffer_max' was never set. Since !false is true and "a && true" equals "a", method could be safely removed
renaming of enums

renamed the enums according to FIXME comment
renaming according to FIXME
tackled deprecation with getMaxVideoBitrate

changed the return type to int
therefore the code around the occurences had to be adjusted
it is not perfect yet, but I think it is ok to remove the deprecation warning