Add preopt scripts to mainline.

These scripts support art preopting in system_other, which is
a generically useful thing to keep on mainline.

Note that the preloads_copy script should also be added, but
that needs some work to be done (b/116714695).

Bug: 80410283
Test: lunch mainline_arm64; m nothing
Change-Id: I693e17ac0f61f2417ced639d1fdfe164c54341a9
diff --git a/target/product/mainline_system.mk b/target/product/mainline_system.mk
index 80efa4c..cbd37a9 100644
--- a/target/product/mainline_system.mk
+++ b/target/product/mainline_system.mk
@@ -18,11 +18,16 @@
 $(call inherit-product, $(SRC_TARGET_DIR)/product/handheld_system.mk)
 $(call inherit-product, $(SRC_TARGET_DIR)/product/telephony_system.mk)
 
-# OTA support.
+# OTA support
 PRODUCT_PACKAGES += \
     update_engine \
     update_verifier \
 
+# system_other support
+PRODUCT_PACKAGES += \
+    cppreopts.sh \
+    otapreopt_script \
+
 # Enable dynamic partition size
 PRODUCT_USE_DYNAMIC_PARTITION_SIZE := true