Add READ_DEVICE_CONFIG permission for PANU usage

When running as PANU, Bluetooth process needs READ_DEVICE_CONFIG
permission, so is allowed to use of DeviceConfig API for PANU.

Bug: 148908889
Test: NAP and PANU manually
Change-Id: I7baf09a620726de4d7ce41d549063b6e98ca5541
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 780e7bf..ff1f0b6 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -46,6 +46,7 @@
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
     <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
     <uses-permission android:name="android.permission.CONNECTIVITY_INTERNAL" />
+    <uses-permission android:name="android.permission.READ_DEVICE_CONFIG" />
     <uses-permission android:name="android.permission.NETWORK_FACTORY" />
     <uses-permission android:name="android.permission.TETHER_PRIVILEGED" />
     <uses-permission android:name="android.permission.MODIFY_PHONE_STATE" />