Prevent crash from strange SQLite error

Full fix may require packaging and using our own SQLite via JNI. Needs
further investigation.

Fixes #2506
Closes #2843

// FREEBIE

src/org/thoughtcrime/securesms/database/ApnDatabase.java

@@ -20,6 +20,7 @@ import android.content.Context;
 import android.content.res.AssetManager;
 import android.database.Cursor;
 import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteException;
 import android.text.TextUtils;
 import android.util.Log;
 
@@ -89,9 +90,13 @@ public class ApnDatabase {
     Util.copy(context.getAssets().open(ASSET_PATH, AssetManager.ACCESS_STREAMING),
               new FileOutputStream(dbFile));
 
+    try {
       this.db = SQLiteDatabase.openDatabase(context.getDatabasePath(DATABASE_NAME).getPath(),
                                             null,
                                             SQLiteDatabase.OPEN_READONLY | SQLiteDatabase.NO_LOCALIZED_COLLATORS);
+    } catch (SQLiteException e) {
+      throw new IOException(e);
+    }
   }
 
   private Apn getCustomApnParameters() {