RMX1921: sepolicy: Label qcom extcon sysfs

This fixes:
W android.ui: type=1400 audit(0.0:37): avc: denied { read } for name=name dev=sysfs ino=60802 scontext=u:r:system_server:s0 tcontext=u:object_r:sysfs:s0 tclass=file permissive=0
W ExtconUEventObserver: Unable to read /sys/devices/platform/soc/c440000.qcom,spmi/spmi-0/spmi0-02/c440000.qcom,spmi:qcom,pm8150b@2:qcom,usb-pdphy@1700/extcon/extcon4/cable.1/name. This probably means the selinux policies need to be changed.
W ExtconUEventObserver: java.io.FileNotFoundException: /sys/class/extcon/extcon4/cable.1/name: open failed: EACCES (Permission denied)
W ExtconUEventObserver: at libcore.io.IoBridge.open(IoBridge.java:574)
W ExtconUEventObserver: at java.io.FileInputStream.<init>(FileInputStream.java:160)
W ExtconUEventObserver: at android.os.FileUtils.readTextFile(FileUtils.java:637)
W ExtconUEventObserver: at com.android.server.ExtconUEventObserver.<init>(ExtconUEventObserver.java:222)
W ExtconUEventObserver: at com.android.server.ExtconUEventObserver.initExtconInfos(ExtconUEventObserver.java:173)
W ExtconUEventObserver: at com.android.server.ExtconUEventObserver.getExtconInfoForTypes(ExtconUEventObserver.java:185)
W ExtconUEventObserver: at com.android.server.policy.PhoneWindowManager.initializeHdmiStateInternal(PhoneWindowManager.java:3709)
W ExtconUEventObserver: at com.android.server.policy.PhoneWindowManager.initializeHdmiState(PhoneWindowManager.java:3672)
W ExtconUEventObserver: at com.android.server.policy.PhoneWindowManager.init(PhoneWindowManager.java:2121)
W ExtconUEventObserver: at com.android.server.wm.WindowManagerService.run(WindowManagerService.java:1186)
W ExtconUEventObserver: at android.os.Handler.run(Handler.java:965)
W ExtconUEventObserver: at android.os.Handler.handleCallback(Handler.java:942)
W ExtconUEventObserver: at android.os.Handler.dispatchMessage(Handler.java:99)
W ExtconUEventObserver: at android.os.Looper.loopOnce(Looper.java:201)
W ExtconUEventObserver: at android.os.Looper.loop(Looper.java:288)
W ExtconUEventObserver: at android.os.HandlerThread.run(HandlerThread.java:67)
W ExtconUEventObserver: at com.android.server.ServiceThread.run(ServiceThread.java:44)
W ExtconUEventObserver: at com.android.server.UiThread.run(UiThread.java:45)
W ExtconUEventObserver: Caused by: android.system.ErrnoException: open failed: EACCES (Permission denied)
W ExtconUEventObserver: at libcore.io.Linux.open(Native Method)
W ExtconUEventObserver: at libcore.io.ForwardingOs.open(ForwardingOs.java:563)
W ExtconUEventObserver: at libcore.io.BlockGuardOs.open(BlockGuardOs.java:274)
W ExtconUEventObserver: at libcore.io.IoBridge.open(IoBridge.java:560)
W ExtconUEventObserver: ... 17 more

Similarily
W ExtconUEventObserver: Unable to read /sys/devices/platform/soc/88e0000.qcom,msm-eud/extcon/extcon2/cable.1/name. This probably means the selinux policies need to be changed.
W ExtconUEventObserver: Unable to read /sys/devices/platform/soc/c440000.qcom,spmi/spmi-0/spmi0-02/c440000.qcom,spmi:qcom,pm8150b@2:qcom,qpnp-smb5/extcon/extcon3/cable.1/name. This probably means the selinux policies need to be changed.

Test: Label these sysfs and boot into system

Change-Id: I94f2407d404e7dd33975b6d825d207c0b6208714
Signed-off-by: kaderbava <ksbava7325@gmail.com>