Activity Integration don't call every activity plugins

Do not return every time, otherwise all triggers like onBeforePost will just work on the first plugin and not on the other.
This patch will not fix the compatibility with the existing plugins because some are returning "true" for generic triggers.
It is also possible to get all values and return a merge of these, but the __call function must call every activity plugins.
@obsidev Just a question here: what are you trying to return in here?

You probably ment to use && instead of bitwise and (even if it works) but I can also see that you're returning only the first value and not considering the other results at all.