[lite] Update Hexagon Delegate guide FAQ about disabling SELinux policy on rooted devices to run.

PiperOrigin-RevId: 359093410
Change-Id: Icaaef877c189c5d4e036946269ece310bc5cf918
diff --git a/tensorflow/lite/g3doc/performance/hexagon_delegate.md b/tensorflow/lite/g3doc/performance/hexagon_delegate.md
index 3137d91..501c4aa 100644
--- a/tensorflow/lite/g3doc/performance/hexagon_delegate.md
+++ b/tensorflow/lite/g3doc/performance/hexagon_delegate.md
@@ -290,3 +290,6 @@
     *   Some phone manufactures intentionally restrict the use of Hexagon DSP
         from non-system Android apps, making the Hexagon delegate unable to
         work.
+*   My phone has locked DSP access. I rooted the phone and still can't run the
+    delegate, what to do ?
+    *   Make sure to disable SELinux enforce by running `adb shell setenforce 0`