Input language switching. Bug: 2331173

New feature to enable fast switching between input languages for
multilingual users. Keyboard settings lets you select a bunch of
languages to switch between from the Latin IME.

Use the Globe icon to toggle between languages.

Needs more work and some layout changes in specialized keyboards.

Also added a Russian keyboard (needs some pixel TLC at the right edge).
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 753d0dc..3b3965e 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -208,4 +208,7 @@
     <string name="popular_domain_3">".gov"</string>
     <!-- popular web domains for the locale - item 4, displayed in the popup -->
     <string name="popular_domain_4">".edu"</string>
+    
+    <!-- Title for input language selection screen -->
+    <string name="language_selection_title">Select input languages</string>
 </resources>