Automotive overlay config changes for enabling GNSS time detection.

Bug: 157265008
Test: Manual
Change-Id: Ib146d3d131144d8a04921a13ced74988639c897f
diff --git a/car_product/overlay/frameworks/base/core/res/res/values/config.xml b/car_product/overlay/frameworks/base/core/res/res/values/config.xml
index e16ae72..5497070 100644
--- a/car_product/overlay/frameworks/base/core/res/res/values/config.xml
+++ b/car_product/overlay/frameworks/base/core/res/res/values/config.xml
@@ -126,4 +126,16 @@
         <item>"no_modify_accounts"</item>
     </string-array>
 
+    <!-- Specifies priority of automatic time sources. Suggestions from higher entries in the list
+         take precedence over lower ones.
+         See com.android.server.timedetector.TimeDetectorStrategy for available sources. -->
+    <string-array name="config_autoTimeSourcesPriority">
+        <item>telephony</item>
+        <item>network</item>
+        <item>gnss</item>
+    </string-array>
+    <!-- Enables the GnssTimeUpdate service. This is a switch for enabling Gnss time based
+         suggestions to TimeDetector service. -->
+    <bool name="config_enableGnssTimeUpdateService">true</bool>
+
 </resources>