Keep keyboard layout while orientation change

This change can retain symbols layout only, can't retain shift or
shift lock state of the keyboard.

Bug: 4311428
Change-Id: I6248ed9a6d762e1ca4b72e391fdca9bc9f55ac35
diff --git a/java/src/com/android/inputmethod/keyboard/KeyboardSwitcher.java b/java/src/com/android/inputmethod/keyboard/KeyboardSwitcher.java
index 7ad947c..bb21d7a 100644
--- a/java/src/com/android/inputmethod/keyboard/KeyboardSwitcher.java
+++ b/java/src/com/android/inputmethod/keyboard/KeyboardSwitcher.java
@@ -152,7 +152,8 @@
             boolean voiceButtonOnPrimary) {
         mSwitchState = SWITCH_STATE_ALPHA;
         try {
-            loadKeyboardInternal(attribute, voiceKeyEnabled, voiceButtonOnPrimary, false);
+            final boolean isSymbols = (mCurrentId != null) ? mCurrentId.isSymbolsKeyboard() : false;
+            loadKeyboardInternal(attribute, voiceKeyEnabled, voiceButtonOnPrimary, isSymbols);
         } catch (RuntimeException e) {
             // Get KeyboardId to record which keyboard has been failed to load.
             final KeyboardId id = getKeyboardId(attribute, false);