Integrate UI with authentication flow.

blimp/client/app/android/java/strings/android_blimp_strings.grd

Index: blimp/client/app/android/java/strings/android_blimp_strings.grd
diff --git a/blimp/client/app/android/java/strings/android_blimp_strings.grd b/blimp/client/app/android/java/strings/android_blimp_strings.grd
index 720d47b7cd27488047860d6a34790f5e1b1b8f3f..c24b779ca4c987ffd79243b7cdb2612f527828a1 100644
--- a/blimp/client/app/android/java/strings/android_blimp_strings.grd
+++ b/blimp/client/app/android/java/strings/android_blimp_strings.grd
@@ -199,9 +199,12 @@
       <message name="IDS_BLIMP_ASSIGNER_URL" desc="Blimp Assigner URL.">
         Assigner URL
       </message>
-     <message name="IDS_BLIMP_ASSIGNER_CHANGED_PLEASE_RESTART" desc="Blimp assigner changed, restart message.">
+      <message name="IDS_BLIMP_ASSIGNER_CHANGED_PLEASE_RESTART" desc="Blimp assigner changed, restart message.">
         Please restart the application to use the new assigner configuration.
       </message>
+      <message name="IDS_BLIMP_SIGN_OUT_RESTART" desc="User sign out, restart message.">
+        Please restart the application.
+      </message>
       <message name="IDS_BLIMP_SWITCH_CHANGED_PLEASE_RESTART" desc="Blimp switch changed, restart message.">
         Blimp switch changed, Please restart the application.
       </message>
@@ -211,6 +214,15 @@
       <message name="IDS_BLIMP_RESTART_NOW" desc="Restart now message">
         Restart Now
       </message>
+      <message name="IDS_BLIMP_SIGN_IN_TITLE" desc="Sign in.">
+        Please sign in
+      </message>
+      <message name="IDS_BLIMP_SIGN_IN_MSG" desc="Sign in message.">
+        Please sign in to google account to enable Blimp.
+      </message>
+      <message name="IDS_BLIMP_SIGN_IN_BTN" desc="Sign in button.">
+        Sign in now
+      </message>
     </messages>
   </release>
 </grit>