With data-client added as library module (#3656)

* With data-client added as library module

* Fix build

data-client/.travis.yml

@@ -0,0 +1,23 @@
+language: android
+jdk: oraclejdk8
+android:
+  components:
+    - platform-tools
+    - tools
+
+    # The BuildTools version used by your project
+    - build-tools-28.0.3
+
+    # The SDK version used to compile your project
+    - android-28
+
+    # Additional components
+    - extra-android-m2repository
+
+licenses:
+    - android-sdk-preview-license-.+
+    - android-sdk-license-.+
+before_script:
+    - chmod +x gradlew
+
+script: "./gradlew test"