b/17209397. NOOP getServiceMap() if we are in the tombstone app.

If this is the Email Tombstone app, we throw an ISE when
we launch the app after resetting data because certain
services do not exist in this version of the app.

Change-Id: I01d88ac2b745d45c1835354b36837f8aaaf378d8

src/com/android/email/service/EmailServiceUtils.java

@@ -543,6 +543,12 @@ public class EmailServiceUtils {
             }
 
             final ImmutableMap.Builder<String, EmailServiceInfo> builder = ImmutableMap.builder();
+            if (!context.getResources().getBoolean(R.bool.enable_services)) {
+                // Return an empty map if services have been disabled because this is the Email
+                // Tombstone app.
+                sServiceMap = builder.build();
+                return sServiceMap;
+            }
 
             try {
                 final Resources res = context.getResources();