Enable userspace reboot for walley and taimen

Test: adb shell getprop ro.init.userspace_reboot.is_supported
Test: atest CtsUserspaceRebootHostSideTestCases
Bug: 135984674
Change-Id: I2cb50062a75bb4b7372847fb57c121773252956c
diff --git a/device.mk b/device.mk
index 31797b7..4ddc38c 100755
--- a/device.mk
+++ b/device.mk
@@ -17,6 +17,9 @@
 # Enable updating of APEXes
 $(call inherit-product, $(SRC_TARGET_DIR)/product/updatable_apex.mk)
 
+# Enable userspace reboot
+$(call inherit-product, $(SRC_TARGET_DIR)/product/userspace_reboot.mk)
+
 ifneq (,$(filter 27, $(PRODUCT_EXTRA_VNDK_VERSIONS)))
     _vndk_test := true
 endif