Update preferred networks selection menu

Move "Use 2G Only" checkbox to "Network Mode" Menu
This menu consists of the followings in GSM Phone:
- 4G/LTE
- 3G
- 2G

4G/LTE means it's preferred, falling back to 3G, falling back to 2G.
3G means it's preferred, falling back to 2G.
2G means 2G only.

If config_prefer_2g is false, "2G Only" removes from Menu.
To use "LTE" menu, set config_enabled_lte true as mcc/mnc.
That means config_enabled_lte is false as default.
If set config_show4GForLTE true in SystemUI, display 4G instead of LTE.

In case of CDMA Phone with LTE,
- LTE
- 3G
- 1x
- Global
For (global) roaming of cdma, should set config_show_cdma true as mcc/mnc.

Bug: 10332749, 10783369
Change-Id: I74a9096f528bcd2a9a1162b53194ece653243bf7
diff --git a/res/values/strings.xml b/res/values/strings.xml
index f102cb7..ad876fa 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -516,10 +516,63 @@
     <string name="multi_category_enable">Multi-category enabled</string>
     <string name="multi_category_disable">Multi-category disabled</string>
 
-    <!-- Mobile network settings screen, setting option name -->
-    <string name="prefer_2g">Use only 2G networks</string>
-    <!-- Mobile network settings screen, setting summary text -->
-    <string name="prefer_2g_summary">Saves battery</string>
+    <string-array name="enabled_networks_except_gsm_choices" translatable="false">
+        <item>LTE</item>
+        <item>3G</item>
+    </string-array>
+    <string-array name="enabled_networks_except_gsm_4g_choices" translatable="false">
+        <item>4G</item>
+        <item>3G</item>
+    </string-array>
+    <string-array name="enabled_networks_except_gsm_values" translatable="false">
+        <item>"9"</item>
+        <item>"0"</item>
+    </string-array>
+
+    <string-array name="enabled_networks_except_lte_choices" translatable="false">
+        <item>3G</item>
+        <item>2G</item>
+    </string-array>
+    <string-array name="enabled_networks_except_lte_values" translatable="false">
+        <item>"0"</item>
+        <item>"1"</item>
+    </string-array>
+
+    <string-array name="enabled_networks_except_gsm_lte_choices" translatable="false">
+        <item>3G</item>
+    </string-array>
+    <string-array name="enabled_networks_except_gsm_lte_values" translatable="false">
+        <item>"0"</item>
+    </string-array>
+
+    <string-array name="enabled_networks_choices" translatable="false">
+        <item>LTE</item>
+        <item>3G</item>
+        <item>2G</item>
+    </string-array>
+    <string-array name="enabled_networks_4g_choices" translatable="false">
+        <item>4G</item>
+        <item>3G</item>
+        <item>2G</item>
+    </string-array>
+    <string-array name="enabled_networks_values" translatable="false">
+        <item>"9"</item>
+        <item>"0"</item>
+        <item>"1"</item>
+    </string-array>
+
+    <string-array name="enabled_networks_cdma_choices" translatable="false">
+        <item>LTE</item>
+        <item>3G</item>
+        <item>1x</item>
+        <item>Global</item>
+    </string-array>
+    <string-array name="enabled_networks_cdma_values" translatable="false">
+        <item>"8"</item>
+        <item>"4"</item>
+        <item>"5"</item>
+        <item>"10"</item>
+    </string-array>
 
     <!-- CDMA System select strings -->
     <!-- Mobile network settings screen, setting option name -->