Include soong modules instead of using PRODUCT_COPY_FILES

The xml files are defined as prebuilt_etc modules. Use those modules
instead of copying them manually with PRODUCT_COPY_FILES.

Bug: 314933937
Test: m aosp_cf_system_x86_64
Change-Id: I97569381a29ade620584b96b20908c514a07e981
diff --git a/target/product/handheld_system.mk b/target/product/handheld_system.mk
index fb55f56..3f3bd01 100644
--- a/target/product/handheld_system.mk
+++ b/target/product/handheld_system.mk
@@ -33,6 +33,7 @@
 $(call inherit-product-if-exists, frameworks/webview/chromium/chromium.mk)
 
 PRODUCT_PACKAGES += \
+    android.software.window_magnification.prebuilt.xml \
     BasicDreams \
     BlockedNumberProvider \
     BluetoothMidiService \
@@ -88,9 +89,6 @@
 
 PRODUCT_PACKAGES += framework-audio_effects.xml
 
-PRODUCT_COPY_FILES += \
-    frameworks/native/data/etc/android.software.window_magnification.xml:$(TARGET_COPY_OUT_SYSTEM)/etc/permissions/android.software.window_magnification.xml \
-
 PRODUCT_VENDOR_PROPERTIES += \
     ro.carrier?=unknown \
     ro.config.notification_sound?=OnTheHunt.ogg \