Adding gradle script for Android Studio

Change-Id: I640c63e2981337eb8c8ed191b40c0649a986361e
diff --git a/.gitignore b/.gitignore
index aea5d61..7240e48 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,3 +8,9 @@
 WallpaperPicker/gen/
 WallpaperPicker/.project.properties
 bin/
+.idea/
+.gradle/
+local.properties
+gradle/
+build/
+gradlew*
\ No newline at end of file