[SP20.2] Change permission to access network stats provider API

This is for the VtDataUsageProvider which lives in phone process
and provides data usage to NetworkStatsService. While the counter-
part (aosp/1242603) is changed to use the dedicated permission.
Change caller site accordingly in telephony part is needed.

Test: adb shell dumpsys netstats
Test: atest FrameworksTelephonyTests
Bug: 149652079

Change-Id: I981220fd22c9dd78dcdee1a13dd1a221a00444e8
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index a1949dd..835ed10 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -208,6 +208,7 @@
          ACTION_SIM_SLOT_STATUS_CHANGED broadcast to start activities
          from the background.  -->
     <uses-permission android:name="android.permission.START_ACTIVITIES_FROM_BACKGROUND" />
+    <uses-permission android:name="android.permission.NETWORK_STATS_PROVIDER" />
 
     <application android:name="PhoneApp"
             android:persistent="true"