Recovery: remove sysfs access

Bug: 65643247
Test: adb sideload an ota package
Test: mount /system
Test: view recovery logs
Test: run graphics test
Test: run locale test
Test: wipe data/factory reset
Test: factory reset from Settings app
Tested on sailfish; no selinux denials to sysfs type are observed.

Change-Id: Ic8487d53d90b7d1d050574e0b084627d1b6abdba