Set verity mode as the verified property value

Set the verity mode as the value for partition.%s.verified to make it
easier for userspace to determine in which mode dm-verity was started.

Change-Id: Icc635515f8a8ede941277aed196867351d8387cb
diff --git a/adb/remount_service.cpp b/adb/remount_service.cpp
index 483ca3d..b150274 100644
--- a/adb/remount_service.cpp
+++ b/adb/remount_service.cpp
@@ -112,13 +112,13 @@
     }
 
     bool system_verified = false, vendor_verified = false;
-    property_get("partition.system.verified", prop_buf, "0");
-    if (!strcmp(prop_buf, "1")) {
+    property_get("partition.system.verified", prop_buf, "");
+    if (strlen(prop_buf) > 0) {
         system_verified = true;
     }
 
-    property_get("partition.vendor.verified", prop_buf, "0");
-    if (!strcmp(prop_buf, "1")) {
+    property_get("partition.vendor.verified", prop_buf, "");
+    if (strlen(prop_buf) > 0) {
         vendor_verified = true;
     }