[REFACTOR]: Move streamApiLow to privmx-endpoint module (#120)

* refactor: move streamApiLow and required classes to privmx-endpoint

* chore: comment unimplemented methods in streamApiLow

* refactor: change jni functions names after moving java classes to new dir

* refactor: change paths to java classes in jni after refactor

* chore: remove redundant functions in jni

* chore: reformat file

* refactor: move streamApiLow to privmx-endpoint

* refactor: remove stream classes from privmx-endpoint-streams and use those from privmx-endpoint

* feat: remove redundant classes and import right ones

* refactor: change the way of creating streamApiLow

* refactor: move java stream events classes to new directory

* refactor: Move stream event selector type and event type

* feat: move streamApiLow jni part

* feat: uncomment implemented methods

* feat: init method in jni

* feat: correct imports

* feat: remove class

* feat: remove stream parsers

* feat: remove classes from android jni and move them to privmx-endpoint

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Co-authored-by: Dawid Jenczewski <djenczewski@simplito.com>
Co-authored-by: djenczewski <149203207+djenczewski@users.noreply.github.com>

Author: Doominika