Adding a separate manifest for the Library project to avoid duplicate
entries in Launcher when build using gradle.

Change-Id: Ib41ce7e947f5bb625a7c0b79f8137f16541fa9ae
diff --git a/LibraryManifest.xml b/LibraryManifest.xml
new file mode 100644
index 0000000..ebf1191
--- /dev/null
+++ b/LibraryManifest.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.android.wallpaperpicker"
+    android:versionCode="1"
+    android:versionName="1.0"
+    />
\ No newline at end of file