Including WallpaperPicker in SDK build

Bug: 35724630
Test: None
Change-Id: I5b066171b70899d4d980d3cdedd32ad58ade9b90
diff --git a/target/product/sdk_base.mk b/target/product/sdk_base.mk
index 30beb9b..0cdb05d 100644
--- a/target/product/sdk_base.mk
+++ b/target/product/sdk_base.mk
@@ -47,6 +47,7 @@
 	sqlite3 \
 	SystemUI \
 	EasterEgg \
+	WallpaperPicker \
 	WidgetPreview
 
 # Define the host tools and libs that are parts of the SDK.