Revert "Revert "Add /sys/kernel/memory_state_time to sysfs_power.""

This reverts commit f3b18408ce755637d009226e6dc1d74bfad37fb8.

Reason for revert: Rolling original change forward again, more carefully.

Change-Id: I11cd323701dc235043548b19e68ed885418c91e3
diff --git a/sepolicy/genfs_contexts b/sepolicy/genfs_contexts
index 670ec8a..053cc40 100644
--- a/sepolicy/genfs_contexts
+++ b/sepolicy/genfs_contexts
@@ -38,7 +38,6 @@
 genfscon sysfs /devices/soc/2080000.qcom,mss          u:object_r:sysfs_msm_subsys:s0
 genfscon sysfs /kernel/boot_adsp/boot                 u:object_r:sysfs_msm_subsys:s0
 genfscon sysfs /kernel/boot_slpi/boot                 u:object_r:sysfs_msm_subsys:s0
-genfscon sysfs /kernel/memory_state_time              u:object_r:sysfs_power:s0
 genfscon sysfs /devices/soc/600000.qcom,pcie          u:object_r:sysfs_pcie:s0
 genfscon sysfs /devices/soc/6a00000.ssusb/6a00000.dwc3/gadget/lun0/ u:object_r:sysfs_android_usb:s0
 genfscon sysfs /devices/soc/8c0000.qcom,msm-cam       u:object_r:sysfs_camera:s0