Add changelog for 334
This MR was automatically created from CI, https://gitlab.com/gitlab-org/gitter/gitter-android-app/-/jobs/224537110
We copied CURRENT_VERSION.txt
-> 334.txt
This MR was automatically created from CI, https://gitlab.com/gitlab-org/gitter/gitter-android-app/-/jobs/224537110
We copied CURRENT_VERSION.txt
-> 334.txt