Deleting the WallpaperPicker code inside launcher.
Instead linking it to the packages/apps/WallpaperPicker project

Change-Id: Ib6830b180a22c22afece01e0a4f6e94e89d6452b
diff --git a/build.gradle b/build.gradle
index 44f5b7c..ca49c13 100644
--- a/build.gradle
+++ b/build.gradle
@@ -32,8 +32,8 @@
     }
     sourceSets {
         main {
-            res.srcDirs = ['res', 'WallpaperPicker/res']
-            java.srcDirs = ['src', 'WallpaperPicker/src']
+            res.srcDirs = ['res']
+            java.srcDirs = ['src']
             manifest.srcFile 'AndroidManifest.xml'
             proto.srcDirs 'protos/'
         }
@@ -54,6 +54,7 @@
     compile 'com.android.support:support-v4:23.0.1'
     compile 'com.android.support:recyclerview-v7:23.0.1'
     compile 'com.google.protobuf.nano:protobuf-javanano:3.0.0-alpha-2'
+    compile project(":WallpaperPicker-Lib")
 
     testCompile 'junit:junit:4.12'
     androidTestCompile 'com.android.support.test:runner:+'