Change protectionLevel for READ_PRECISE_PHONE_STATE from dangerous to
signatureOrSystem.

Bug: 17952946
Change-Id: I4a75da11cb092ca795d0eacf824890eb12c7446a
diff --git a/core/res/AndroidManifest.xml b/core/res/AndroidManifest.xml
index 937f83a..8462d8a 100644
--- a/core/res/AndroidManifest.xml
+++ b/core/res/AndroidManifest.xml
@@ -1223,7 +1223,7 @@
          @hide Pending API council approval -->
     <permission android:name="android.permission.READ_PRECISE_PHONE_STATE"
         android:permissionGroup="android.permission-group.PHONE_CALLS"
-        android:protectionLevel="dangerous"
+        android:protectionLevel="signature|system"
         android:label="@string/permlab_readPrecisePhoneState"
         android:description="@string/permdesc_readPrecisePhoneState" />