TelephonyProvider: Fix Default APN Preference Overlay on 1st Boot

In the current code on CM13, the overlay preference can only be
called when Reset APN Settings is called.

Looking at the source history this is a regression. Comparing with
history, I've restored reading the overlay and tested that the
default preference is now marked on the first boot.

Change-Id: I3141d486afd45405c57ed25a89d9fa838fadf794

1 files changed, 18 insertions, 5 deletions

diff --git a/src/com/android/providers/telephony/TelephonyProvider.java b/src/com/android/providers/telephony/TelephonyProvider.java
index 354a009..f95fec4 100644
--- a/src/com/android/providers/telephony/TelephonyProvider.java
+++ b/src/com/android/providers/telephony/TelephonyProvider.java
@@ -1796,11 +1796,24 @@ public class TelephonyProvider extends ContentProvider
     private long getPreferredApnId(int subId, boolean checkApnSp) {
         SharedPreferences sp = getContext().getSharedPreferences(PREF_FILE, Context.MODE_PRIVATE);
         long apnId = sp.getLong(COLUMN_APN_ID + subId, INVALID_APN_ID);
-        if (apnId == INVALID_APN_ID && checkApnSp) {
-            apnId = getPreferredApnIdFromApn(subId);
-            if (apnId != INVALID_APN_ID) {
-                setPreferredApnId(apnId, subId);
-                deletePreferredApn(subId);
+        if (apnId == INVALID_APN_ID) {
+            if (checkApnSp) {
+                apnId = getPreferredApnIdFromApn(subId);
+                if (apnId == INVALID_APN_ID) {
+                    apnId = getDefaultPreferredApnId();
+
+                    if (apnId != INVALID_APN_ID) {
+                        setPreferredApnId(apnId, subId);
+                    }
+                } else {
+                    setPreferredApnId(apnId, subId);
+                    deletePreferredApn(subId);
+                }
+            } else {
+                apnId = getDefaultPreferredApnId();
+                if (apnId != INVALID_APN_ID) {
+                    setPreferredApnId(apnId, subId);
+                }
             }
         }
         return apnId;