Add GitHub workflows

Author: skydoves

.github/CODEOWNERS

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+# Lines starting with '#' are comments.
+# Each line is a file pattern followed by one or more owners.
+
+# More details are here: https://help.github.com/articles/about-codeowners/
+
+# The '*' pattern is global owners.
+# Not adding in this PR, but I'd like to try adding a global owner set with the entire team.
+# One interpretation of their docs is that global owners are added only if not removed
+# by a more local rule.
+
+# Order is important. The last matching pattern has the most precedence.
+# The folders are ordered as follows:
+
+# In each subsection folders are ordered first by depth, then alphabetically.
+# This should make it easy to add new rules without breaking existing ones.
+*       @skydoves

.github/dependabot.yml

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+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://docs.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+  - package-ecosystem: "gradle" # See documentation for possible values
+    directory: "/" # Location of package manifests
+    schedule:
+      interval: "daily"
+    # Allow up to 10 open pull requests for pip dependencies
+    open-pull-requests-limit: 10

.github/pull_request_template.md

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+### 🎯 Goal
+Describe the big picture of your changes here to communicate to the maintainers why we should accept this pull request. If it fixes a bug or resolves a feature request, be sure to link to that issue.
+
+### 🛠 Implementation details
+Describe the implementation details for this Pull Request.
+
+### ✍️ Explain examples
+Explain examples with code for this updates.
+
+### Preparing a pull request for review
+Ensure your change is properly formatted by running:
+
+```gradle
+$ ./gradlew spotlessApply
+```
+
+Please correct any failures before requesting a review.

.github/workflows/android.yml

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+name: Android CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: set up JDK
+        uses: actions/setup-java@v1
+        with:
+          distribution: adopt
+          java-version: 17
+
+      - name: Cache Gradle and wrapper
+        uses: actions/cache@v2
+        with:
+          path: |
+            ~/.gradle/caches
+            ~/.gradle/wrapper
+          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*') }}
+          restore-keys: |
+            ${{ runner.os }}-gradle-
+      - name: Make Gradle executable
+        run: chmod +x ./gradlew
+
+      - name: Build with Gradle
+        run: ./gradlew build