Issue 5389 - Create basic circle ci build script

.circleci/config.yml

Index: .circleci/config.yml
===================================================================
new file mode 100644
--- /dev/null
+++ b/.circleci/config.yml
@@ -0,0 +1,34 @@
+version: 2
+jobs:
+  build:
+    working_directory: ~/adblockplussbrowser
+    docker:
+      - image: circleci/android:api-25-alpha
+    environment:
+      JVM_OPTS: -Xmx3200m
+    steps:
+      - checkout
+      - restore_cache:
+          key: jars-{{ checksum "build.gradle" }}-{{ checksum  "adblockplussbrowser/build.gradle" }}
+      - run:
+          name: Download Dependencies
+          command: ./gradlew androidDependencies
+      - save_cache:
+          paths:
+            - ~/.gradle
+          key: jars-{{ checksum "build.gradle" }}-{{ checksum  "adblockplussbrowser/build.gradle" }}
+      - run:
+          name: Run Lint Checks
+          command: ./gradlew lint checkDebug
+      - store_artifacts:
+          path: adblockplussbrowser/build/reports/
+          destination: reports/
+      - run:
+          name: Assemble Debug
+          command: ./gradlew assembleDebug 
+      - run:
+          name: Assemble Release
+          command: ./gradlew assembleRelease 
+      - store_artifacts:
+          path: adblockplussbrowser/build/outputs/apk/
+          destination: apks/

[diegocarloslima, 2017/08/07 21:25:21]

Looks good, but where some needed variables such as the Android SDK goes? I'm
not familiar with circle CI btw :)

[jens, 2017/08/08 10:36:49]

CircleCi provides docker images for Android builds. All the Android specific
stuff in bundled in the docker image and is automatically installed. Depending
on what version we use, we have a different Emulator, SDK, SDK-Tool and Build
Tool versions. The docker images are open-source and available on GitHub:
https://github.com/circleci/circleci-images/tree/master/android

Basically I used the recommended Android build script with some litte
extensions, such as storing the APKs and the lint reports.
CircleCI offers a lot more options and customizations. For example we can think
about automatically include translations in the future. And of course we should
write some tests and include running them in the build.