Add feature flag for IPSEC_TUNNEL_MIGRATION to Pixel6/7/8

This commit adds the IPSEC_TUNNEL_MIGRATION feature flag,
with XFRM_MIGRATE used as the implementation

Verified on bluejay

Bug: 273379472
Test: build, flash and verify with "adb shell pm list features"
Test: atest IpSecManagerTunnelTest
Change-Id: Ia19663288b389dbfa0ce5ca328b5706b1767db78
diff --git a/device.mk b/device.mk
index 2813186..f686621 100644
--- a/device.mk
+++ b/device.mk
@@ -23,3 +23,6 @@
 
 # Installs gsi keys into ramdisk, to boot a developer GSI with verified boot.
 $(call inherit-product, $(SRC_TARGET_DIR)/product/developer_gsi_keys.mk)
+
+PRODUCT_COPY_FILES += \
+	frameworks/native/data/etc/android.software.ipsec_tunnel_migration.xml:$(TARGET_COPY_OUT_VENDOR)/etc/permissions/android.software.ipsec_tunnel_migration.xml