sm6225-common: Add charger service

- Taken from CodeLinaro.
- Fixes offline charging.

Change-Id: I614caefc4a7318e833247a20344f9b9efdcbeea4

rootdir/etc/init.qcom.rc

@@ -757,6 +757,13 @@ service profiler_daemon /system/bin/profiler_daemon
     group root
     disabled
 
+service charger /system/bin/charger
+    class charger
+    user system
+    group system graphics input
+    capabilities SYS_BOOT
+    seclabel u:r:charger:s0
+
 service vendor.ssr_diag /system/vendor/bin/ssr_diag
     class late_start
     user system