Adds modern wallpaper pickers to AOSP installs

Bug: b/294871815
Change-Id: Id4c198f79a32b1b5a6a1a594cbb88f8df1623fe7
Test: built and flashed aosp device and launched ThemePicker
Test: ran all CTS tests per b/294871815#comment11 on aosp device with ThemePicker
diff --git a/target/product/aosp_product.mk b/target/product/aosp_product.mk
index e396ad1..78506f6 100644
--- a/target/product/aosp_product.mk
+++ b/target/product/aosp_product.mk
@@ -32,6 +32,7 @@
     messaging \
     PhotoTable \
     preinstalled-packages-platform-aosp-product.xml \
+    ThemePicker \
     WallpaperPicker \
 
 # Telephony: