update_verifier: correct group in rc file

update_verifier should be in the cache group, not 'class'.

Also use PLOG instead of LOG if care_map.txt cannot be opened.

Bug: 36818743
Test: boot sailfish
Test: fake OTA on sailfish and verify update_verifier reads care_package

(cherry picked from commit 3a8002f8c0)

Change-Id: I7e4cccd457ee84054164077c81d04ad7cb394c7a

update_verifier/update_verifier.cpp

@@ -167,7 +167,7 @@ static bool verify_image(const std::string& care_map_name) {
     // in /data/ota_package. To allow the device to continue booting in this situation,
     // we should print a warning and skip the block verification.
     if (care_map_fd.get() == -1) {
-        LOG(WARNING) << "Warning: care map " << care_map_name << " not found.";
+        PLOG(WARNING) << "Failed to open " << care_map_name;
         return true;
     }
     // Care map file has four lines (two lines if vendor partition is not present):

update_verifier/update_verifier.rc

@@ -1,11 +1,11 @@
 service update_verifier_nonencrypted /system/bin/update_verifier nonencrypted
     user root
-    class cache
+    group cache
     priority -20
     ioprio rt 1
 
 service update_verifier /system/bin/update_verifier ${vold.decrypt}
     user root
-    class cache
+    group cache
     priority -20
     ioprio rt 1