You can register yourself at https://openmrs.atlassian.net/servicedesk/customer/portal/3/group/8/create/18 and ask for jira issue tracker access.
https://talk.openmrs.org/t/openmrs-contrib-android-client/32583?u=vasharma05 You can check this thread for more info for android-client. For more queries, you should use OpenMRS Talk.