Project build successful (commons-app#2412)

* Fixed issue commons-app#2285

* modified gradle.properties

* updation in build.gradle

* updated travis.yml

Author: vanshikaarora

.travis.yml

@@ -15,11 +15,11 @@ android:
   components:
   - tools
   - platform-tools
-  - build-tools-27.0.3
+  - build-tools-28.0.3
   - extra-google-m2repository
   - extra-android-m2repository
   - android-22
-  - android-27
+  - android-28
   - sys-img-${ANDROID_ABI}-${ANDROID_TARGET}
   licenses:
   - android-sdk-license-.+

gradle.properties

@@ -15,8 +15,8 @@
 #Thu Mar 01 15:28:48 IST 2018
 org.gradle.jvmargs=-Xmx1536M
 android.enableBuildCache=true
-compileSdkVersion=android-27
-buildToolsVersion=27.0.3
+compileSdkVersion=android-28
+buildToolsVersion=28.0.3
 
 SUPPORT_LIB_VERSION=27.1.1
 KOTLIN_VERSION=1.2.60