microdroid: Add device-mapper capabilities to ueventd.

Bug: 270183812
Test: treehugger
Change-Id: I87d7836ea6e875712c0a01b52a22c90745d53a2a
diff --git a/microdroid/init.rc b/microdroid/init.rc
index 871db94..42033d6 100644
--- a/microdroid/init.rc
+++ b/microdroid/init.rc
@@ -147,10 +147,11 @@
 
 service ueventd /system/bin/ueventd
     user root
+    group root
     class core
     critical
     seclabel u:r:ueventd:s0
-    capabilities CHOWN DAC_OVERRIDE DAC_READ_SEARCH FOWNER FSETID MKNOD NET_ADMIN SETGID SETUID SYS_MODULE SYS_RAWIO
+    capabilities CHOWN DAC_OVERRIDE DAC_READ_SEARCH FOWNER FSETID MKNOD NET_ADMIN SETGID SETUID SYS_MODULE SYS_RAWIO SYS_ADMIN
 
 service console /system/bin/sh
     class core