Add a separate read permission for oem unlock state

New privileged permission READ_OEM_UNLOCK_STATE added
for system privileged apps.

Changing the unlock state still requires the old
permission OEM_UNLOCK_STATE, which is signature protected.

Bug: 28953956
Change-Id: Iedd2ad1d2d1dc3ae91122d7c406e3ee623a47d61
diff --git a/core/res/AndroidManifest.xml b/core/res/AndroidManifest.xml
index 6c289dc..b03ba20 100644
--- a/core/res/AndroidManifest.xml
+++ b/core/res/AndroidManifest.xml
@@ -1416,6 +1416,11 @@
     <permission android:name="android.permission.DVB_DEVICE"
         android:protectionLevel="signature|privileged" />
 
+    <!-- @SystemApi Allows reading the OEM unlock state
+         @hide <p>Not for use by third-party applications. -->
+    <permission android:name="android.permission.READ_OEM_UNLOCK_STATE"
+        android:protectionLevel="signature|privileged" />
+
     <!-- @hide Allows enabling/disabling OEM unlock
    <p>Not for use by third-party applications. -->
     <permission android:name="android.permission.OEM_UNLOCK_STATE"