add github actions

add work flow for android build
for PRs targetting multi_module

.github/PULL_REQUEST_TEMPLATE/pull_request_template.md

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+## :loudspeaker: Type of change
+<!--- Put an `x` in the boxes that apply, remove checkboxes from remaining -->
+
+- [ ] Bugfix
+- [ ] New feature
+- [ ] Enhancement
+- [ ] Refactoring
+
+## :scroll: Description
+<!--- Describe your changes in detail -->
+
+## :bulb: Motivation and Context
+<!--- Why is this change required? What problem does it solve? -->
+<!--- If it fixes an open issue, please link to the issue here. -->
+
+## :green_heart: How did you test it?
+<!--- Describe how the changes were tested -->
+
+## :pencil: Checklist
+<!--- Put an `x` in the boxes that apply, remove checkboxes from remaining -->
+
+- [ ] I reviewed submitted code
+- [ ] I added tests to verify changes
+- [ ] All tests passing
+- [ ] All linters passing
+- [ ] There are no code climate issues
+
+## :crystal_ball: Next steps
+<!--- Describe any changes that need to be made after merging this PR -->
+<!--- Describe any changes that you would like to make after merging this PR -->
+
+## :camera_flash: Screenshots / GIFs
+<!--- Mandatory for UI changes -->
+<!-- Uncomment the next line and replace it with links to your screenshots. -->
+<!--
+<img src="https://placekitten.com/260/260" width="260">&emsp;
+<img src="https://placekitten.com/300/300" width="260">&emsp;
+→

.github/workflows/android.yml

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+name: Android CI
+
+on:
+  push:
+    branches: [ "multi_module" ]
+  pull_request:
+    branches: [ "multi_module" ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: set up JDK 17
+      uses: actions/setup-java@v3
+      with:
+        java-version: '17'
+        distribution: 'temurin'
+        cache: gradle
+
+    - name: Grant execute permission for gradlew
+      run: chmod +x gradlew
+    - name: Build with Gradle
+      run: ./gradlew build