Update android.md

Author: iaulakh

articles/communication-services/quickstarts/ui-library/includes/get-started-call/android.md

@@ -41,6 +41,16 @@ Click `Finish`.
 
 In your app level (**app folder**) `UILibraryQuickStart/app/build.gradle`, add the following dependency.
 
+```groovy
+android {
+    ...
+    packagingOptions {
+        pickFirst  'META-INF/*'
+    }
+    ...
+}
+```
+
 ```groovy
 dependencies {
     ...