a71-common: Prefer 'cache' backing storage

* Android 14 allows using /cache as scratch partition. This applies only
to non-A/B devices and provides much faster overlayfs setup.

Change-Id: I2fd13fbe3dbd9c36e569f59022a59bc9068ffa79

system.prop

@@ -1,6 +1,3 @@
-# Filesystem
-fs_mgr.overlayfs.prefer_cache_backing_storage=true
-
 # Netflix
 ro.netflix.bsp_rev=Q6150-17263-1
 

vendor.prop

@@ -178,6 +178,9 @@ drm.service.enabled=true
 # Fastbootd
 ro.fastbootd.available=true
 
+# Filesystem
+fs_mgr.overlayfs.prefer_cache_backing_storage=true
+
 # Fingerprint
 ro.vendor.fingerprint.force_calibrate=true
 ro.vendor.fingerprint.max_enrollments=4