gradle: adds additional gradle examples

pages/common/gradle.md

@@ -1,11 +1,19 @@
 # gradle
 
-> Gradle is the official build system for Android Studio.
+> Gradle is an advanced open source build automation system.
 
 - Compile a package:
 
 `gradle build`
 
+- Exclude test task:
+
+`gradle build -x test`
+
+- Run in offline mode:
+
+`gradle build --offline`
+
 - Clear the build folder:
 
 `gradle clean`
@@ -13,3 +21,7 @@
 - Compile and Release package:
 
 `gradle assembleRelease`
+
+- Create Gradle wrapper:
+
+`gradle wrapper --gradle-version {{gradle_version}}`