Show preview of F1 keys properly

Change-Id: Ie1c6a13efcada09d29c1006224dcf54000c14283
diff --git a/java/src/com/android/inputmethod/latin/LatinKeyboard.java b/java/src/com/android/inputmethod/latin/LatinKeyboard.java
index 2ce91ce..db4d167 100644
--- a/java/src/com/android/inputmethod/latin/LatinKeyboard.java
+++ b/java/src/com/android/inputmethod/latin/LatinKeyboard.java
@@ -299,12 +299,7 @@
             mMicIcon = mRes.getDrawable(R.drawable.sym_keyboard_mic);
             m123MicIcon = mRes.getDrawable(R.drawable.sym_keyboard_123_mic);
         }
-        if (m123Key != null) {
-            m123Key.icon = m123MicIcon;
-        }
-        if (mF1Key != null) {
-            mF1Key.icon = mMicIcon;
-        }
+        updateF1Key();
         if (mSpaceKey != null) {
             mSpaceKey.icon = mSpaceIcon;
             updateSpaceBarForLocale(f);