Add merge request and issue templates

.gitlab/issue_templates/bug.md

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+<!--- Provide a general summary of the issue in the Title above -->
+
+## Description
+
+<!--- Describe your bug in detail -->
+
+#### Expected behavior
+
+#### Actual behavior
+
+#### Steps to reproduce
+
+1.
+2.
+3.
+
+#### Screenshot / video
+
+<!--Add a screenshot or screencast when applicable-->
+<!--To take a screenshot, see https://support.google.com/android/answer/9075928?hl=en-->
+
+
+## Context
+
+#### App version
+
+<!--You can find it in the About screen of the app-->
+
+#### Android version
+
+#### Device model
+
+#### App mode
+
+<!--Remove the useless modes-->
+**Smartphone**
+
+**TV**
+
+**Auto**

.gitlab/issue_templates/feature_request.md

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+<!--- Provide a general summary of the request in the Title above -->
+
+## Description
+
+<!--- Describe your request in detail -->
+
+#### Expected behavior
+
+
+#### Screenshot / video
+
+<!--Add a screenshot or screencast when applicable-->
+<!--To take a screenshot, see https://support.google.com/android/answer/9075928?hl=en-->
+
+#### App mode
+
+<!--Remove the useless modes-->
+
+**Smartphone**
+
+**TV**
+
+**Auto**

.gitlab/merge_request_templates/merge_request.md

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+<!--- Provide a general summary of your changes in the Title above -->
+
+## Description
+
+<!--- Describe your changes in detail -->
+
+## Motivation and Context
+
+<!--- Why is this change required? What problem does it solve? -->
+
+## How Has This Been Tested?
+
+<!--- Please describe in detail how you tested your changes. -->
+<!--- Include details of your testing environment, and the tests you ran to -->
+<!--- see how your change affects other areas of the code, etc. -->
+
+## Screenshots / GIFs (if appropriate):
+
+## Types of changes
+
+<!--- What types of changes does your code introduce? Put an `x` in all the boxes that apply: -->
+
+- [ ] Bug fix (non-breaking change which fixes an issue)
+- [ ] New feature (non-breaking change which adds functionality)
+- [ ] Enhancement (non-breaking change which cleans up / improves existing functionality)
+- [ ] Breaking change (fix or feature that would cause existing functionality to change)
+
+## Checklist
+
+<!--- Go over all the following points, and put an `x` in all the boxes that apply. -->
+<!--- If you're unsure about any of these, don't hesitate to ask. We're here to help! -->
+
+- [ ] I have read the **CONTRIBUTING** section of the [**README**](https://code.videolan.org/videolan/vlc-android/blob/master/README.md) document.
+
+## Resolves
+
+<!-- List the issues that will be closed by this PR in the following format -->
+<!-- This will ensure that they are automatically closed once the PR is merged -->
+<!--Remove unneeded lines-->
+Fixes: #
+Mention: #